There are many myths that concern poseidon. One is that Poseidon and Athena both fought to be the patron of Athens. Athena won.
In ancient Greek myth, Poseidon did not die.
Not in Greek myth.
No Zeus did not kill Poseidon in Greek myth.
The Greek god Poseidon was born of the Greek Titans Rhea and Cronus, according to Greek myth.
In Greek myth Poseidon has had both sons and daughters.
Greek myth does not say.
Neptune
In Greek myth, it is with Poseidon.
Not in Greek myth, he is a priest of Poseidon.
In Greek myth, Poseidon is the son of Cronus and of Rhea, the brother of Zeus, Hades, Hestia, Demeter and Hera. Poseidon was the god of the sea.
In Greek Myth, Despoena is the daughter of Poseidon by Demeter.
The number is not told in Greek myth.