Yes, their daughter was Persephone.
Zeus
There was only one child between Zeus and Demeter, and that was Persephone.
Zeus loved Demeter and had Persephone.
Yes, with both Demeter who he had Persephone with, and with Hera who he married.
Persephone, daughter of Demeter and Zeus, became Queen of the Underworld with Hades as King.
Demeter is Zeus' older sister
Zeus is the brother of Demeter
Demeter had one child with Zeus, a daughter named Persephone.
Persephone's parents are Zeus and Demeter.
Hestia, Demeter, Hera, Hades, Poseidon, and Zeus were the children of Cronus and Rhea.
No. Demeter is the daughter of Kronos and Rhea. She and Zeus are siblings.
Demeter and Zeus did not marry, but did have the child Persephone/Kore.