All over the world, Couster (Couster 
) is an extremely rare boy's first name. Much more prevalently, Couster is the last name as well as the forename.
Ms, Charlotte, Alexandre, Isabelle, Virginie, Déborah, Murielle, Marlène, Quentin, Vanessa, Jessica, Ludovic, Laurent, Bastien, Chanasi, Morgane, Monique, Julien, Seb, Sã, Marc, Anne, Lisa, Elen, Stéphanie, Aline, David, Yoann, Alexis, Karine, Gilles, Julian, Denis, and Sébastien