Esther appears 62 times at rank 1646 on female pets. It's a biblical name with Persian roots, meaning "star" in some etymological accounts, and it's currently undergoing the same vintage revival that's bringing Myrtle and Mabel back into circulation. Choosing it now is genuinely ahead of the curve.
The Vintage Revival Arc
Esther peaked as a human name in the early twentieth century, disappeared for most of the middle decades, and is now being rediscovered by owners who want something genuinely old without being tired. It belongs with Myrtle and Vera in the cohort of names that skipped a generation and came back charming rather than dated. The human-name trend is at /names/esther.
The Pop-Culture Anchor
Esther the Wonder Pig, a 600-pound pig adopted by a Toronto couple who documented her life on social media, became a genuine internet phenomenon and made the name widely visible in a warm, animal-welfare context. For pet owners, the association is unambiguously positive.
Sound and Breed Fit
ES-tur is two syllables, soft but deliberate. It suits female animals with quiet dignity and a slightly regal bearing. Cats especially carry it well, but gentle large breeds like Great Pyrenees and Newfoundlands also wear it with the right gravitas.