That doesn't mean it didn't come from Hinduism. The concept and word were in Greek when Homer was writing, around 800 - 700 BC, and Hinduism was coalescing around 1500 - 600 BC (it says on Wikipedia). Greek and Sanskrit are related languages, and the Greek word has a root in their common ancestor. We know there was cultural interchange between the Greek and Indian worlds. Indeed, it's probably a mistake to think of them as separate worlds; Europe and India seems quite distinct now, but there was a time when it was all just the fertile crescent and its hinterlands.

Admittedly, it's probably wrong to say it came from Hinduism per se. But it doesn't seem impossible that the Greek, Hindu, and Zoroastrian ideas are from the same root.