The name Guillermina means Feminine Form Of Guillermo and is of Spanish origin. Guillermina is a name that's been used primarily by parents who are considering baby names for girls.
Guillermina is currently not ranked in U.S. births
Baby Names Tip: Beware of "Expectation" names like Honor, Chastity, or Justice. They place an undue expectation of character that your child might just not be able to live up to.