Firmin \f(i)-rmin, fir-min\ as a boy's name is a variant of Fermin (Spanish), and the meaning of Firmin is "strong".

The baby name Firmin sounds like Furman, Freman, Furmann and Fuhrman. Other similar baby names are Armin, Carmin, Ermin, Farrin, Farin, Ferrin, Garmin, Germin and Jermin.