Who was the grandparents of Triton?

Triton, in Greek mythology, is the son of Poseidon, the god of the sea, and Amphitrite, a sea goddess. Therefore, his grandparents are Cronus and Rhea, the parents of Poseidon, and Nereus and Doris, the parents of Amphitrite. Cronus and Rhea are Titans, while Nereus and Doris are sea deities from the ocean's depths.