Elly lands at rank 1702 with 60 female-leaning registry entries. It's a diminutive spelling of Ellie (itself a nickname for Eleanor, Helen, Ella, or Elizabeth) that adds a second L without changing the pronunciation — an alternate spelling choice that in pet licensing contexts is partly an artifact of owners writing the name phonetically.
Elly vs. Ellie — The Spelling Layer
Ellie is one of the most popular female dog names in North American registries, consistently appearing in the top 20 across multiple datasets. Elly is a variant that's rare enough on the human side to read as slightly more distinctive. In pet contexts, the distinction between Ellie and Elly is almost entirely visual — spoken aloud, they're the same name. The extra-L spelling appears more in informal contexts and in regions where phonetic spelling is more common in licensing paperwork. Ellie and Ella are the registry neighbors.
The Name's Warmth and Function
Whatever the spelling, Elly/Ellie is among the warmest-sounding pet names available: two syllables, bright vowels, soft consonants, ends in the open -ee sound that many animals respond to particularly well. It suits gentle, sociable breeds: Cavalier King Charles Spaniels, Golden Retrievers, Poodles. The name also appears on cats with similar frequency.
The Counter-Read
If an owner deliberately chose the Elly spelling for distinctiveness, it works; it will rarely be misspelled in the other direction. If it arrived via licensing form, the dog is probably called Ellie in practice. Either way, it's a genuinely lovely name to say.