(original title: Le Prénom, literally "The First Name") is a French-Belgian comedy film, written and directed by Alexandre de La Patellière and Matthieu Delaporte and released in 2012.

[4] Vincent, a real estate agent and father-to-be is invited for dinner by his sister Elisabeth and his brother-in-law Pierre.

While waiting for dinner to be served, Vincent decides to play a practical joke by pretending that his unborn son will be named Adolphe after the French literary hero.

When pressed for more information about his mysterious partner, Claude eventually reveals that it is Vincent and Elisabeth's mother Francoise.

Elisabeth tells Pierre that he will be in charge of cleaning up dinner, putting their children to bed and will be sleeping on the couch until further notice.

4 months later, Pierre, Elisabeth, Claude and Francoise arrive to visit Vincent and Anna at the hospital to see their child, who is unexpectedly a daughter.

[6] The same theatrical piece was adapted by Francesca Archibugi and Francesco Piccolo and led to the creation of the film Il nome del Figlio, released in Italian cinemas on 22 January 2015.

A further adaptation of the theater piece was made in Germany: Der Nachname, released in German cinemas on 19 October 2018.