1,204 names in this catalogue are ones English Wiktionary lists as a female given name. They average 177 registrations each — roughly double the catalogue — which is what happens when a naming pool is old, large and familiar to everybody.
Longer and softer than the male set
467 classify soft-sounding and 271 run to three syllables or more. The male human names go the other way: their largest sound group is easy-to-call and they hold more than twice as many single-syllable names.
That is a fact about English given names rather than about pets. Female given names in English are longer on average, and the registers inherit the pattern intact.
Practical consequences
Three syllables get shortened, and a soft ending disappears at distance. Together those are the two things to decide before the household decides for you: pick the short form, and check it still ends in something audible.
289 of these are four letters or fewer, which sidesteps both. 45 carry a checked meaning, which is a large share of the 111 this site publishes in total.
What are good human names for a female pet?
Princess, Penny, Lily and Stella lead these registers. 1,204 names here are ones a dictionary lists as a female given name.
Are female human names longer?
In this catalogue, yes: 271 run to three syllables or more and 467 classify soft, where the male set is shorter and blunter.
Do they have meanings?
45 of them do — a large share of the 111 checked meanings on this site, because well-used given names are the ones somebody bothered to look up.
Every count on this site is a tally of real registrations: pet licences and shelter intakes published as open data by New York, Seattle, Austin, Montgomery County, Cambridge, Zurich, Basel and four Australian councils. Popularity here is the average share a name holds across those registers, so a name common in a small city is not buried by one common in a large one. Five of the eleven registers are North American and they supply 86% of the records, so read the ordering as naming in those places rather than worldwide. Browse the whole catalogue or read how the data is put together.