Not to many.
One of them was Persephone who was captured by Hades, but that's a different story entirely.
Zeus
There was only one child between Zeus and Demeter, and that was Persephone.
ZeusPersephonePoseidonDespoinaArionIasionPlutusPhilomelusKarmanorEubuleusChrysothemisTriptolemusAmphitheus IOceanusDmia
Yes, their daughter was Persephone.
Persephone, daughter of Demeter and Zeus, became Queen of the Underworld with Hades as King.
ya, persephone.
Zeus loved Demeter and had Persephone.
Poseidon had a few kids. He had Theseus with Aethra, Neuplius with Amymone and Arion with Demeter.
None, as Demeter never married.
Persephone was her main daughter; the one always spoken of in mythologies.
Yes, with both Demeter who he had Persephone with, and with Hera who he married.
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.