Morgan ranks at #635 with 194 entries, registered as gender-neutral on this chart. The name is Welsh in origin (commonly read as "sea-circle" or "sea-born"), with a long history of cross-gender use in human naming and an even more balanced split on pets. One of the cleaner truly-neutral picks on the chart.
The Arthurian connection
Morgan carries a substantial Arthurian overlay: Morgan le Fay is one of the central female magical figures in the cycle, sister to King Arthur and a recurring sorceress across centuries of retellings. The name has therefore carried both a feminine-mythic register and a masculine-Welsh-surname register simultaneously for centuries, which is why it lands so cleanly as gender-neutral on a registry.
The horse-breed overlay for older owners
For a slice of older American owners, Morgan also carries the Morgan horse breed overlay: one of the earliest American horse breeds, named for Justin Morgan, a Vermont schoolteacher whose 18th-century stallion founded the line. The horse-name register sometimes leaks onto pet dogs, particularly in rural and equestrian-adjacent households where the name reads as familiar from the barn before the dog park.
Sound and breed lean
Two syllables, front-stressed (MOR-gan), with a hard opening consonant and a soft trailing N. The name carries cleanly outside. It lands across a wide breed range without strong concentration: Golden Retrievers, Labradors, Border Collies, and shelter mixes all turn up. The human Morgan page shows steady cross-gender use; pet Morgan tracks alongside.