The Greek word for “princess” is πριγκίπισσα (prinkipissa), not “vasileia”. I think you’re confusing it with the Greek word for “queen”, which is βασίλισσα (vasilissa). It’s much more likely that he just used the Biblical Greek form of
Leah.
I think Padmé is probably a French-style variation of
Padma, and
Anakin is based off of
Ken Annakin’s surname.