Orion is from the Greek Ōríōn — the legendary hunter of Greek mythology, whose name appears as one of the most-recognizable constellations in the night sky. Orion in Greek mythology — legendary hunter, son of Poseidon; one of the most-told myths in classical literature; according to one version, he was killed by Artemis (the goddess of the hunt) when he tried to assault one of her companions; placed in the heavens as the constellation Orion alongside his hunting dogs Sirius (Canis Major) and Procyon (Canis Minor). Orion Pictures — major American film studio.
Orion does not currently appear in the US Social Security Administration's top 1,000 girls' names, so we don't publish a US rank or birth count for it. That says nothing about the name's standing elsewhere in the world — only that it sits outside the ranked US data we rely on.
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In Pythagorean numerology the letters of Orion reduce to 8, The Visionary. This is a traditional interpretive system, not a factual claim about the name.