Helios' daughter is Circe, a sorceress who turned all of Odysseus's men into pigs before he threatened to kill her. The goddess of the moon in Greek mythology was Selene, or sometimes Artemis. Artemis was more of the moon Goddess as a Roman god than a Greek one.
No children of Phobetor are known in Greek myth.
Children of God (English) -> παιδιά του Θεού /Phonetically paidiá tou Theoú/ (Greek)
The Greek god and goddess that have the most children is Nyx (Night), Zeus (Lighting) , and Aphrodite (Love)
poseidon
No: Hestia the Greek goddess was a virgin.
nymphs
earthquakeshorsestsunamiscyclopes children
None which are known.
1,000,000
Hellen had Aeolus
Zeus did because he had many Godly children and many Demi-God children