Paco
[ˈpɑːkoʊ]Meaning
A Spanish diminutive of Francisco, used as a nickname.
Background Story
Paco is a Spanish nickname for Francisco, and Behind the Name records it as a diminutive of that name. Wiktionary states the nickname's origin is unclear; a popular etymology deriving it from Saint Francis of Assisi and the Latin pater communitatis is rejected by the Diccionario de la lengua española. The related nickname Pancho also comes from Francisco, dropping the initial F for P.

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