Morgan comes from the Welsh Morcant — composed of mor (sea) and cant (circle, edge) — meaning "sea circle" or "sea-born." Morgan le Fay, the powerful enchantress and half-sister of King Arthur in Arthurian legend, is the most famous mythological bearer.
Today it sits in the U.S. top 600 and remains a recognizable American classic.
Morgan 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.
In Pythagorean numerology the letters of Morgan reduce to 5, The Seeker. This is a traditional interpretive system, not a factual claim about the name.