Yes, his wife Amphitrite, his sisters Demeter, Hera, and Hestia.
neptune
Aphrodite! the goddess of beauty who arised from the sea foam
No, athena was a virgin goddess so she didn't have any children
Poseidon had many kids. He had children with the goddess Demeter. and also i believe he had kid/kids with Aphrodite. there is more thats just what i know off the top of my head.
Poseidon is the god of earthquakes. No goddess has this responsibility.
The goddess Athena
Poseidon is King of the Sea. No god or goddess ruled him in his domain.
if this is what ur asking poseidon's wife amphitrite queen of the sea.
There is an older god of the sea: Nereus, who was replaced by the Olympian god, Poseidon. So there is no goddess of the sea. Amphitrite is the wife of Poseidon. She is then the sea goddess.
Amphitrite was the goddess of the sea, married to Poseidon, god of the sea
Poseidon
Poseidon