they could of been named after halfgods offspring of jupiter and his mistresses :D then the moons would be the kids of jupiter :D

google says this: Jupiter Consort Juno Children Mars, Vulcan, Bellona, Juventas Parents Saturn and Ops Siblings Roman tradition: Juno, Ceres, Vesta Greco-Roman: Pluto and Neptune

pehraps they were taken already for some other celestial bodies. idk too much about that.

super cool for the dude though that his names got picked :D must be feeling like a champ :D

That actually would have been cool. Not sure if they were taken. He has a video where he explains more about it and the background to the names he picked.