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Guillermo meaning and name origin
Guillermo \gu(i)-ller-mo, guill(e)-rmo\ as a boy's name has the meaning "determined protector" and is a variant of Guillaume (Old German): French variant of William.
Suggested similar baby names are Gillermo and Guilherme.
View a list of the 2 names that reference Guillermo.
Popularity of Guillermo
Guillermo is a very popular first name for males (#379 out of 1220) and also a very popular surname or last name for all people (#9828 out of 88799) (2000 U.S. Census).
Displayed below is the baby names popularity of Guillermo name for boys (2012 statistics). Compare Guillermo with its source forms and related boy baby names.