Eloisa is the Italian and Spanish form of Eloise, which goes back to the Old French Héloïse; its origin is uncertain and it is usually explained from the Germanic hail and wid as "healthy" and "wide", or linked to Louise, "famous warrior". The medieval scholar Héloïse, famous for her letters to Abelard, made it a name of learning and romance. Eloisa has risen from number 2975 in 2015 to number 1529 in 2025, its best rank so far.