Blu ranks at #181 with 578 entries, and the spelling is the entire story. The standard "Blue" is also widely used as a pet name (and ranks separately on our leaderboard), but Blu — without the E — has become its own identifiable register, slightly more modern and slightly more deliberate.
The dropped-E spelling pattern
Blu without the E mirrors the broader pet-naming trend toward minimal-letter spellings (Coda, Kona, Loki) that have proliferated over the past 10 to 15 years. The shorter spelling reads as more contemporary and more fashion-coded than the standard form. Compare with Koda, which uses the same minimalist instinct, and Kona, which sits adjacent on the leaderboard.
One counter-reading: a meaningful share of pet Blus are named after the 2011 animated film Rio, where Blu is a Spix's macaw. That film cohort is now reaching pet-adoption age (mid-20s), which is consistent with Blu sitting in the top 200 rather than fading out. The film's parrot-blue color register also matches a subset of blue-merle dogs and silver cats whose owners pick the name visually.
Where the name lands by breed
Australian Shepherds, Australian Cattle Dogs (Blue Heelers), Weimaraners, and gray-blue mixed breeds over-index on Blu. Cats with blue or silver coats also carry the name well, and Russian Blue cats produce a particularly tight cluster. The fashionable single-syllable shape lands on small companions too. Compare with the Australian Shepherd leaderboard and the Weimaraner leaderboard for breed-specific clustering. Owners who pick Blu rather than the standard Blue spelling are usually committed to that aesthetic choice and rarely waver on it.
