Who did Hephaestus have children with?

He had several children with different goddesses:

With Aglaea: Eucleia, Euthenia, Eupheme, Philophrosyne

With Gaia: Erichthonius

With Aetna: Palici

With Cabeiro: The Cabeiri

Anticlea: Peripheries

Aphrodite (in a few Greek Myths): Harmonia.

Mothers unknown: Ardalus, Cercyon, Olenus, Palaemonius, Argonauts, Philottus, Pylius who cured Philoctetes at Lemnos, Spinter