The nymph Chariclo and the shepherd Everes.

His wife was either Ceres or Chariclo/Chariklo. Chariclo was either a Naiad, Nymph, or female centaur. Ceres was the Roman equivalent of Demeter, goddess of agriculture. You know how the Greeks were: all the stories are contradictory. And the Romans probably adapted Chiron's story, but decided he needed a new wife.

Chiron is the son of Kronos and Philyra; his wife is Chariclo, their children are Endeis who married King Aiakos, Melanippe/Ocyrhoe who bore the god of the winds Aiolos, also Carystus who is the father of Aristaios.

Yes; Chiron had children by his wife Chariclo; the nymphs of Mount Pelion in Thessalia ( Nymphai Peliades ) including Endêis, who married Aeacus; Melanippe or Ocyrhoe who had by Hippotes the child Aiolos; as well as a son Carystus.

Yes; his son is Carystus, while his daughters are the Nymphai Peliades: Endêis, Thetis/Melanippe, Ocyrhoe/Ocyroe and Euippe.