BABY NAMES · BOY
Guillermo
Means “resolute protector”
Spanish origin
Guillermo is the Spanish form of William, an old Germanic name made of words for will and helmet.
NAME NUMBER
4
A name that carries calm strength and solid roots.
SWEET NICKNAMES
Memo · Guille
Thinking of Guillermo for your baby?
See what the name holds and which days around your due date shine for it.
Try Guillermo in the Baby Name Studio ✦What does the name Guillermo mean?
Guillermo means "resolute protector". It is a boy's name of Spanish origin.
What are nicknames for Guillermo?
Popular nicknames for Guillermo are Memo, Guille.
Missing a name?
Tell us and we'll add it to the library, after we check its meaning carefully.