Diaz Family History
Diaz Name Meaning
Spanish (Díaz): patronymic from the medieval personal name Didacus (see Diego ). Jewish (Sephardic): adoption of the Spanish surname (see 1 above) at the moment of conversion to Roman Catholicism. After the return to Judaism (generations later) some descendants retained the name their families used as Catholics.
Source: Dictionary of American Family Names 2nd edition, 2022