Abigail ranks at #569 with 218 entries, registered female. The name is Hebrew-derived, traditionally translated as "my father's joy," and it carries one of the strongest human-name registers on this list. Owners reaching for Abigail on a pet are almost always making a deliberate human-formality choice rather than picking a typical pet-name diminutive.
The dignified human-name lineage
Abigail clusters with Eleanor, Charlotte, and Beatrice in the formal-human-name pet pocket — names borrowed straight from the human chart with their full formality intact. The aesthetic skews toward owners who treat their pet as a small dignified person and want a name that holds up at the vet and the dog park without ironic shortening.
Breed lean
The name lands disproportionately on small-to-medium companion breeds — Cavaliers, Poodles, Bichons, Maltese mixes — and on indoor cats with calm, observant personalities. The four-syllable shape (AB-ih-gail) does not recall well across a dog park, which is why most Abigails get day-to-day called Abby. The license form keeps the formal version.
The human crossover
The Abigail baby name page shows the name sitting solidly in the SSA top tier, peaking in the late 2000s and holding steady since. Pet Abigail and human Abigail share a moment without competing — the formal four-syllable shape distinguishes the choice on either side of the species line.