No, Greek gods are immortal. There's an exception here and there, and maybe the Fates could do it but they're not usually killable even by other gods like the Norse or Egyptian pantheons.
Sure, but Disney Hercules's family is Zeus and Hera so it just kind of shuts down that problem entirely. We even know other gods can't kill gods in the Disney version because getting his immortality is a plot point.
Its been a loooong time since I watched this movie but theres also Megara, right?
And if theres Megara, then Hercules' yet to be born children are implied.
If theres Megara and children Hercules will kill them.
c: