Yes yes he was.
Demeter's son is Persephone, who is also known as Kore. She is the goddess of the harvest and agriculture in Greek mythology.
Zeus had many sons. His most popular son is Hercules.
Zeus, Hades and Poseidon. Her sisters were Hera and Hestia.
Demeter's consort was Zeus or Poseidon, depending on the myth.
Her sisters, Hestia, Hera - her brothers Zeus, Hades, Poseidon.
Initially Persephone didn't have a father but later they attributed it to Zeus.
Zeus, Hera, Poseiden, Hades, and Hestia--Siblings Persephone/Kore--daughter (by Zeus) Cronus and Rhea--parents
Zeus had many sons, some Greek gods that are the sons of Zeus include;ApolloAresHephaestusDionysusHermes
Hercules
Yes, by Iasion her son was Philomelus whose son is Parias.By Carmanor her son was Eubulus whose daughter isCarme - with Zeus, Carme had a daughter Britomartis. Thus Demeter had a great grand daughter.
Zeus and Demeter had only one child, a daughter called Kore named Persephone after marrying Hades.