Arthur ranks at #379 with 328 entries, leaning male. This is a strong vintage-revival pick — a formal Anglo-Saxon name (Celtic origin, debated meaning around "bear") that has come back into both baby and pet naming as part of the broader dignified-old-name aesthetic dominant among millennials.
The vintage-revival register
Arthur clusters with Henry, Oliver, Walter, and Winston in the formal-vintage masculine cohort. Owners picking these names are usually engaging with a pet-as-tiny-gentleman framing — the dignity is the joke, but the joke is sincere. The Arthur baby name page shows the SSA chart climbing again through the 2010s after a long mid-century decline.
The Arthur the Aardvark layer
One cultural anchor for younger owners: the PBS show Arthur (1996-2022) ran for a generation and gave the name a warm, kid-friendly cultural footprint. Owners who grew up watching may not consciously connect the dots, but the name's accessible, friendly tone for younger millennial pet owners traces partly through that show.
Sound and breed fit
The two-syllable shape (AR-thur) has a soft trailing consonant and projects clearly across distance, especially with the open front vowel. Arthur lands disproportionately on medium-to-large dogs with calm temperaments — Goldens, Labs, Bernese Mountain Dogs, and dignified mixed breeds. The name suits a dog whose presence carries weight without needing to bark for attention.