Named after the church of Notre-Dame-de-Lorette and the street named after it.
The church, built between 1823 and 1836, is dedicated to Our Lady of Loreto: the name recalls the Holy House of Loreto in Italy, Mary's house, which legend says angels carried from the Holy Land. The street, first rue du Faubourg-Montmartre-Prolongée, then rue Vatry, took the church's name in 1835. Later 'lorette' came to mean a novice courtesan.