If the Greeks called him Poseidon, what did the Romans call him? | Amazon Quiz Amazon Quiz, 3rd July 2021 - If the Greeks called him Poseidon, what did the Romans call him? By Mukesh Sharma - July 3, 2021 If the Greeks called him Poseidon, what did the Romans call him? (Credit: Amazon Quiz) Amazon Daily Quiz, the options for the question – If the Greeks called him Poseidon, what did the Romans call him? Apollo Vulcan Genius Neptune The correct answer is Neptune. Greeks called him Poseidon, and the Romans call him Neptune.