diff --git a/CHANGELOG.md b/CHANGELOG.md
index a1aecfe92..d29efd05d 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -9,3 +9,13 @@ Version 1.5.1
 - remove inexistant `person.css` file
 - fix bug in accompanying person validation
 
+Branch `Similarity`
+==================
+
+- Add an column with fullname canonical (lowercase and unaccent) to persons entity ;
+- Add a trigram index on fullname canonical ;
+- Add a "similar person matcher", which allow to detect person with similar names when adding a person ;
+- Add a research of persons by fuzzy name, returning result with a similarity of 0.15 ;
+
+Thanks to @matla :-)
+
diff --git a/Entity/Person.php b/Entity/Person.php
index 7d19ccc3c..11bad306a 100644
--- a/Entity/Person.php
+++ b/Entity/Person.php
@@ -113,7 +113,12 @@ class Person implements HasCenterInterface {
      * @var \Doctrine\Common\Collections\Collection
      */
     private $addresses;
-
+    
+    /**
+     * @var string
+     */
+    private $fullnameCanonical;
+    
     public function __construct(\DateTime $opening = null) {
         $this->accompanyingPeriods = new ArrayCollection();
         $this->spokenLanguages = new ArrayCollection();
diff --git a/Resources/config/doctrine/Person.orm.yml b/Resources/config/doctrine/Person.orm.yml
index df911068b..543757f9a 100644
--- a/Resources/config/doctrine/Person.orm.yml
+++ b/Resources/config/doctrine/Person.orm.yml
@@ -51,6 +51,9 @@ Chill\PersonBundle\Entity\Person:
             type: text
             nullable: true
             length: 40
+        fullnameCanonical:
+            type: string
+            length: 255
     manyToOne:
         countryOfBirth:
             targetEntity: Chill\MainBundle\Entity\Country
diff --git a/Resources/config/services/search.yml b/Resources/config/services/search.yml
index 2abffbea5..8b4db1373 100644
--- a/Resources/config/services/search.yml
+++ b/Resources/config/services/search.yml
@@ -11,6 +11,18 @@ services:
         tags:
             - { name: chill.search, alias: 'person_regular' }
             
+    Chill\PersonBundle\Search\SimilarityPersonSearch:
+        arguments:
+            - "@doctrine.orm.entity_manager"
+            - "@security.token_storage"
+            - "@chill.main.security.authorization.helper"
+            - "@chill_main.paginator_factory"
+            - '@chill.person.search_person'
+        calls:
+            - ['setContainer', ["@service_container"]]
+        tags:
+            - { name: chill.search, alias: 'person_similarity' }
+
     Chill\PersonBundle\Search\SimilarPersonMatcher:
         arguments:
             $em: '@Doctrine\ORM\EntityManagerInterface'
diff --git a/Resources/migrations/Version20181023101621.php b/Resources/migrations/Version20181023101621.php
new file mode 100644
index 000000000..24632fc12
--- /dev/null
+++ b/Resources/migrations/Version20181023101621.php
@@ -0,0 +1,79 @@
+<?php declare(strict_types=1);
+
+namespace Application\Migrations;
+
+use Doctrine\DBAL\Schema\Schema;
+use Doctrine\Migrations\AbstractMigration;
+
+/**
+ * Add fullnameCanonical column for trigram matching (fast searching)
+ */
+final class Version20181023101621 extends AbstractMigration
+{
+    public function up(Schema $schema) : void
+    {
+        $this->abortIf($this->connection->getDatabasePlatform()->getName() !== 'postgresql', 'Migration can only be executed safely on \'postgresql\'.');
+
+        $this->addSql("ALTER TABLE chill_person_person ADD fullnameCanonical VARCHAR(255) DEFAULT '' ");
+        $this->addSql("UPDATE chill_person_person SET fullnameCanonical=LOWER(UNACCENT(CONCAT(firstname, ' ', lastname)))");
+        $this->addSql("CREATE INDEX fullnameCanonical_trgm_idx ON chill_person_person USING GIN (fullnameCanonical gin_trgm_ops)");
+        
+        $this->addSql(<<<'SQL'
+            CREATE OR REPLACE FUNCTION canonicalize_fullname_on_update() RETURNS TRIGGER AS
+            $BODY$
+            BEGIN
+                IF NEW.firstname <> OLD.firstname OR NEW.lastname <> OLD.lastname
+                THEN
+                   UPDATE chill_person_person
+                   SET fullnameCanonical=LOWER(UNACCENT(CONCAT(NEW.firstname, ' ', NEW.lastname)))
+                   WHERE id=NEW.id;
+                END IF;
+                RETURN NEW;
+            END;
+            $BODY$ LANGUAGE PLPGSQL;
+SQL
+        );
+        $this->addSql(<<<SQL
+            CREATE TRIGGER canonicalize_fullname_on_update
+            AFTER UPDATE
+            ON chill_person_person
+            FOR EACH ROW
+            WHEN (pg_trigger_depth() = 0)
+            EXECUTE PROCEDURE canonicalize_fullname_on_update();
+SQL
+        );
+    
+        $this->addSql(<<<'SQL'
+            CREATE OR REPLACE FUNCTION canonicalize_fullname_on_insert() RETURNS TRIGGER AS
+            $BODY$
+            BEGIN
+                UPDATE chill_person_person
+                SET fullnameCanonical=LOWER(UNACCENT(CONCAT(NEW.firstname, ' ', NEW.lastname)))
+                WHERE id=NEW.id;
+                RETURN NEW;
+            END;
+            $BODY$ LANGUAGE PLPGSQL;
+SQL
+        );
+        $this->addSql(<<<SQL
+            CREATE TRIGGER canonicalize_fullname_on_insert
+            AFTER INSERT
+            ON chill_person_person
+            FOR EACH ROW
+            EXECUTE PROCEDURE canonicalize_fullname_on_insert();
+SQL
+        );
+    }
+
+    public function down(Schema $schema) : void
+    {
+        $this->abortIf($this->connection->getDatabasePlatform()->getName() !== 'postgresql', 'Migration can only be executed safely on \'postgresql\'.');
+
+        $this->addSql('DROP INDEX fullnameCanonical_trgm_idx');
+        $this->addSql('ALTER TABLE chill_person_person DROP fullnameCanonical');
+        $this->addSql('DROP TRIGGER canonicalize_fullname_on_update ON chill_person_person');
+        $this->addSql('DROP FUNCTION canonicalize_fullname_on_update()');
+        $this->addSql('DROP TRIGGER canonicalize_fullname_on_insert ON chill_person_person');
+        $this->addSql('DROP FUNCTION canonicalize_fullname_on_insert()');
+    }
+}
diff --git a/Resources/translations/messages.en.yml b/Resources/translations/messages.en.yml
index a99af9e74..4c0c13d83 100644
--- a/Resources/translations/messages.en.yml
+++ b/Resources/translations/messages.en.yml
@@ -68,4 +68,5 @@ Reset: 'Remise à zéro'
 'Person details': 'Détails de la personne'
 
 Create an accompanying period: Create an accompanying period
-'Create': Create
\ No newline at end of file
+'Create': Create
+Similar persons: Similar persons
diff --git a/Resources/translations/messages.fr.yml b/Resources/translations/messages.fr.yml
index 65b7cd632..ba6d770cf 100644
--- a/Resources/translations/messages.fr.yml
+++ b/Resources/translations/messages.fr.yml
@@ -201,3 +201,4 @@ Aggregate by age: Aggréger par âge
 Calculate age in relation to this date: Calculer l'âge par rapport à cette date
 
 Group people by country of birth: Aggréger les personnes par pays de naissance
+Similar persons: Personnes similaires
diff --git a/Resources/views/Person/list.html.twig b/Resources/views/Person/list.html.twig
index 31b80f477..11252404c 100644
--- a/Resources/views/Person/list.html.twig
+++ b/Resources/views/Person/list.html.twig
@@ -14,7 +14,7 @@
  * You should have received a copy of the GNU Affero General Public License
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #}
-<h2>{{ 'Person search results'|trans }}</h2>
+<h2>{{ title|default('Person search results')|trans }}</h2>
 
 <p>
     {{ '%total% persons matching the search pattern:'|transchoice( total, { '%total%' : total}) }}
diff --git a/Search/PersonSearch.php b/Search/PersonSearch.php
index 0c9d0eab4..6d562ec95 100644
--- a/Search/PersonSearch.php
+++ b/Search/PersonSearch.php
@@ -201,7 +201,7 @@ class PersonSearch extends AbstractSearch implements ContainerAwareInterface,
      * @param array $terms
      * @return \Doctrine\ORM\QueryBuilder
      */
-    protected function createQuery(array $terms)
+    public function createQuery(array $terms)
     {
         //get from cache
         $cacheKey = md5(serialize($terms));
@@ -283,7 +283,7 @@ class PersonSearch extends AbstractSearch implements ContainerAwareInterface,
 
             foreach($grams as $key => $gram) {
                 $qb->andWhere($qb->expr()
-                      ->like('UNACCENT(LOWER(CONCAT(p.firstName, \' \', p.lastName)))', ':default_'.$key))
+                      ->like('p.fullnameCanonical', 'UNACCENT(LOWER(:default_'.$key.'))'))
                       ->setParameter('default_'.$key, '%'.$gram.'%');
             }
         }
diff --git a/Search/SimilarPersonMatcher.php b/Search/SimilarPersonMatcher.php
index 2667f061f..ab13e607a 100644
--- a/Search/SimilarPersonMatcher.php
+++ b/Search/SimilarPersonMatcher.php
@@ -75,14 +75,18 @@ class SimilarPersonMatcher
             . '     OR UNACCENT(LOWER(p.lastName)) LIKE UNACCENT(LOWER(:lastName)) '
             . '     OR UNACCENT(LOWER(p.firstName)) LIKE UNACCENT(LOWER(:lastName)) '
             . '     OR UNACCENT(LOWER(p.lastName)) LIKE UNACCENT(LOWER(:firstName)) '
+            . '     OR SIMILARITY(p.fullnameCanonical, UNACCENT(LOWER(:fullName))) >= 0.15 '
             . ' ) '
-            . ' AND p.center IN (:centers)';
+            . ' AND p.center IN (:centers)'
+            . ' ORDER BY SIMILARITY(p.fullnameCanonical, UNACCENT(LOWER(:fullName))) DESC '
+            ;
         
         $query = 
             $this->em
             ->createQuery($dql)
             ->setParameter('firstName', $person->getFirstName())
             ->setParameter('lastName', $person->getLastName())
+            ->setParameter('fullName', $person->getFirstName() . ' ' . $person->getLastName())
             ->setParameter('centers', $centers)
             ;
         
diff --git a/Search/SimilarityPersonSearch.php b/Search/SimilarityPersonSearch.php
new file mode 100644
index 000000000..bedc715f0
--- /dev/null
+++ b/Search/SimilarityPersonSearch.php
@@ -0,0 +1,266 @@
+<?php
+
+namespace Chill\PersonBundle\Search;
+
+
+use Chill\MainBundle\Pagination\PaginatorFactory;
+use Chill\MainBundle\Search\AbstractSearch;
+use Chill\MainBundle\Search\SearchInterface;
+use Chill\MainBundle\Security\Authorization\AuthorizationHelper;
+use Doctrine\ORM\EntityManagerInterface;
+use Symfony\Component\DependencyInjection\ContainerAwareInterface;
+use Symfony\Component\DependencyInjection\ContainerAwareTrait;
+use Symfony\Component\Form\FormBuilderInterface;
+use Symfony\Component\Security\Core\Authentication\Token\Storage\TokenStorage;
+use Symfony\Component\Security\Core\Role\Role;
+
+/**
+ * Class SimilarityPersonSearch
+ *
+ * @package Chill\PersonBundle\Search
+ */
+class SimilarityPersonSearch extends AbstractSearch
+{
+    
+    use ContainerAwareTrait;
+    
+    /**
+     *
+     * @var EntityManagerInterface
+     */
+    private $em;
+    
+    /**
+     *
+     * @var \Chill\MainBundle\Entity\User
+     */
+    private $user;
+    
+    /**
+     *
+     * @var AuthorizationHelper
+     */
+    private $helper;
+    
+    /**
+     *
+     * @var PaginatorFactory
+     */
+    protected $paginatorFactory;
+    
+    const NAME = "person_similarity";
+    
+    /**
+     *
+     * @var PersonSearch
+     */
+    private $personSearch;
+    
+    
+    /**
+     * SimilarityPersonSearch constructor.
+     *
+     * @param EntityManagerInterface $em
+     * @param TokenStorage $tokenStorage
+     * @param AuthorizationHelper $helper
+     * @param PaginatorFactory $paginatorFactory
+     * @param PersonSearch $personSearch
+     */
+    public function __construct(
+        EntityManagerInterface $em,
+        TokenStorage $tokenStorage,
+        AuthorizationHelper $helper,
+        PaginatorFactory $paginatorFactory,
+        PersonSearch $personSearch)
+    {
+        $this->em = $em;
+        $this->user = $tokenStorage->getToken()->getUser();
+        $this->helper = $helper;
+        $this->paginatorFactory = $paginatorFactory;
+        $this->personSearch = $personSearch;
+        
+        // throw an error if user is not a valid user
+        if (!$this->user instanceof \Chill\MainBundle\Entity\User) {
+            throw new \LogicException('The user provided must be an instance'
+                . ' of Chill\MainBundle\Entity\User');
+        }
+    }
+    
+    /*
+     * (non-PHPdoc)
+     * @see \Chill\MainBundle\Search\SearchInterface::getOrder()
+     */
+    public function getOrder()
+    {
+        return 200;
+    }
+    
+    /*
+     * (non-PHPdoc)
+     * @see \Chill\MainBundle\Search\SearchInterface::isActiveByDefault()
+     */
+    public function isActiveByDefault()
+    {
+        return true;
+    }
+    
+    public function supports($domain, $format)
+    {
+        return 'person' === $domain;
+    }
+    
+    /**
+     * @param array $terms
+     * @param int $start
+     * @param int $limit
+     * @param array $options
+     * @param string $format
+     * @return array
+     */
+    public function renderResult(array $terms, $start = 0, $limit = 50, array $options = array(), $format = 'html')
+    {
+        $total = $this->count($terms);
+        $paginator = $this->paginatorFactory->create($total);
+        
+        if ($format === 'html')
+        {
+            if ($total !== 0)
+            {
+                return $this->container->get('templating')->render('ChillPersonBundle:Person:list.html.twig',
+                    array(
+                        'persons' => $this->search($terms, $start, $limit, $options),
+                        'pattern' => $this->recomposePattern($terms, array('nationality',
+                            'firstname', 'lastname', 'birthdate', 'gender',
+                            'birthdate-before','birthdate-after'), $terms['_domain']),
+                        'total' => $total,
+                        'start' => $start,
+                        'search_name' => self::NAME,
+                        'preview' => $options[SearchInterface::SEARCH_PREVIEW_OPTION],
+                        'paginator' => $paginator,
+                        'title' => "Similar persons"
+                    ));
+            }
+            else {
+                return null;
+            }
+        
+        } elseif ($format === 'json')
+        {
+            return [
+                'results' => $this->search($terms, $start, $limit, \array_merge($options, [ 'simplify' => true ])),
+                'pagination' => [
+                    'more' => $paginator->hasNextPage()
+                ]
+            ];
+        }
+    }
+    
+    
+    /**
+     *
+     * @param string $pattern
+     * @param int $start
+     * @param int $limit
+     * @param array $options
+     * @return Person[]
+     */
+    protected function search(array $terms, $start, $limit, array $options = array())
+    {
+        $qb = $this->createQuery($terms, 'search');
+        
+        
+        if ($options['simplify'] ?? false) {
+            $qb->select(
+                'sp.id',
+                $qb->expr()->concat(
+                    'sp.firstName',
+                    $qb->expr()->literal(' '),
+                    'sp.lastName'
+                ).'AS text'
+            );
+        } else {
+            $qb->select('sp');
+        }
+        
+        $qb
+            ->setMaxResults($limit)
+            ->setFirstResult($start);
+        
+        //order by firstname, lastname
+        
+        $qb
+            ->orderBy('sp.firstName')
+            ->addOrderBy('sp.lastName');
+        
+        if ($options['simplify'] ?? false) {
+            return $qb->getQuery()->getResult(Query::HYDRATE_ARRAY);
+        } else {
+            return $qb->getQuery()->getResult();
+        }
+    }
+    
+    
+    protected function count(array $terms)
+    {
+        $qb = $this->createQuery($terms);
+
+        
+        $qb->select('COUNT(sp.id)');
+        
+        return $qb->getQuery()->getSingleScalarResult();
+    }
+    
+    
+    private $_cacheQuery = array();
+    
+    /**
+     *
+     * @param array $terms
+     * @return \Doctrine\ORM\QueryBuilder
+     */
+    protected function createQuery(array $terms)
+    {
+        //get from cache
+        $cacheKey = md5(serialize($terms));
+        if (array_key_exists($cacheKey, $this->_cacheQuery)) {
+            return clone $this->_cacheQuery[$cacheKey];
+        }
+        
+        $qb = $this->em->createQueryBuilder();
+        
+        $qb ->select('sp')
+            ->from('ChillPersonBundle:Person', 'sp');
+        
+        if ($terms['_default'] !== '') {
+            $grams = explode(' ', $terms['_default']);
+            
+            foreach($grams as $key => $gram) {
+                $qb->andWhere('SIMILARITY(sp.fullnameCanonical, UNACCENT(LOWER(:default_'.$key.')) ) >= 0.15')
+                    ->setParameter('default_'.$key, '%'.$gram.'%');
+            }
+            
+            $qb->andWhere($qb->expr()
+                ->notIn(
+                    'sp.id',
+                    $this->personSearch
+                        ->createQuery($terms)
+                        ->addSelect('p.id')
+                        ->getDQL()
+                )
+            );
+        }
+        
+        //restraint center for security
+        $reachableCenters = $this->helper->getReachableCenters($this->user,
+            new Role('CHILL_PERSON_SEE'));
+        $qb->andWhere($qb->expr()
+            ->in('sp.center', ':centers'))
+            ->setParameter('centers', $reachableCenters)
+        ;
+        
+        $this->_cacheQuery[$cacheKey] = $qb;
+        
+        return clone $qb;
+    }
+    
+}
\ No newline at end of file