User blog comment:Woest/Great Tree Arc and Green Magic/@comment-4999650-20131124163652/@comment-7418318-20131125110518

Because we (or at least the majority of people who participated in the vote) agreed that it was more likely the name Mashima intended to give to Hades after the official english translation came out like that.

With the way how the japanese language has syllables instead of single letters (excpet for vocals) and them not having a real equivalent of 'ch' (ch in german sounds very close to how japanese pronounce 'hi'), Purehito is exactly what you'd end up with if you tried to translocate Precht (a real german name) into japanese, while Purehito would be a mix of english (pure) and japanese (hito = human) that made little sense.