Crossword clues for the word: PROTEUS The word PROTEUS has appeared as an answer to at least 7 crossword clues on different crossword puzzles. Crossword clues for PROTEUS Showing 1 to 7 of 7 results Clue(s) "Old man of the sea, to Homer" Greek god who served Poseidon Inconstant figure favouring odd bits of them and us? Mythological shape-shifter Poseidon's herdsman Sea god in Greek mythology with the gift of prophecy Shape-shifting Greek sea god