Why did Aphrodite in Greek mythology, that is, Venus in Roman mythology, have the name Poseidon?

In hesiod's genealogy, Aphrodite was born from the separation of heaven and earth, and it was born from the foam of the sea, but Poseidon's statement did not come from it. Poseidon said the reason: Aphrodite actually spread to Greece from the East. Her former life was Hista, the Babylonian goddess. At that time, she was the goddess of beauty, love and war. Later, it spread to Syria today. At that time, the Phoenicians worshipped her and changed her title to the goddess Alstar. The Phoenicians were good at sailing, so they gave up the position of Poseidon (the goddess Alstar) to protect them from going to sea. Later, it spread to the eastern Mediterranean, Cyprus Island (according to the genealogy, Aphrodite landed and grew up here), then to Coutela Island and then to Greece, and was renamed Aphrodite, the goddess of beauty and love. Among them, the status of Aphrodite Sivir has gradually faded. It is worth integrating that one of the many lovers of beautiful Aphrodite is Ares (absolutely original)!