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% replaces any number of letters (la% - lake, lamp)_ replaces one letter (ca_ - car, cat)

Crossword clues for Ferdinand was one 3 letters:

REY: Ferdinand was one
REY: Ferdinand V, for one
TORO: Ferdinand, for one.
ELTORO: Ferdinand, for one.
ARCHDUKE: Francis Ferdinand was one
ARAGON: One of Ferdinand II's kingdoms