Where does “アポロー” come from?

アポロー (Japanese) comes from Latin Apollō, from Ancient Greek Ἀπόλλων — the god Apollo; Apollo.

Ancestry of “アポロー”, step by step

Step	Language	Word	Meaning
1	Latin	Apollō	—
2	Ancient Greek	Ἀπόλλων	the god Apollo; Apollo

アポロー — Etymology, Origin & Word History | Etymology Explorer