Demeter was the daughter of Rhea and Cronus, the sister of Hera and Hestia, Zeus, Poseidon, and Hades. Her most famous child was Persephone.
Strangely enough yes, Demeter was related to Zeus, along with the other main gods e.g. Hera. Hades, Poseidon and Hestia. They were brothers and sisters. But this didn't stop Zeus from having a quick affair with Demeter, which led to the creation of Persephone
yes they are realted
No
her parents
No.
They are cousins.
There was no "god of Demeter", Demeter was a Greek goddess.
Demeter
No
they are not
no
no