Crossword clues for the word: FIDELIS The word FIDELIS has appeared as an answer to at least 6 crossword clues on different crossword puzzles. Crossword clues for FIDELIS Showing 1 to 6 of 6 results Clue(s) ''Semper __'' """Adeste ___""" """Semper ___"" (Marines motto)" "Semper ___" (Marine Corps motto) Adjective in the Marine motto Faithful to Caesar?