What do the Greeks call Poseidon?

In ancient Greek mythology, Poseidon is known as "Ποσειδῶν" (Poseidōn). He is the god of the sea, earthquakes, and horses, and is one of the twelve Olympian deities. His Roman equivalent is Neptune. Poseidon was often depicted with a trident and is associated with various myths and legends related to the sea and maritime activities.