Zeus lands at #55 with 1,495 entries, and there is exactly one rule that explains where the name concentrates: the bigger the dog, the more likely it is to be named Zeus. German shepherds, Rottweilers, Great Danes, Cane Corsos. Owners are not subtle about it, and the name is not asking them to be.
The big-dog naming logic
Mythological names do specific work in pet naming. They are short enough to call across a yard, recognizable enough to draw a comment at the dog park, and grand enough to flatter a 120-pound animal without irony. Zeus is the ur-example. Apollo, Thor, Atlas, and Loki occupy adjacent slots in the same naming pool, and owners often pick between them based on which mythology they grew up reading. Compare with the German Shepherd leaderboard to see how this clusters.
One counter-reading: the name occasionally lands on a small dog as a deliberate joke, which is its own coherent owner segment. A six-pound chihuahua named Zeus is not an accident. The bigger pattern still holds, though — most Zeus owners are working with a large breed and choosing a name that matches.
The sound is doing real work
Zeus is one of the rare pet names that opens with a Z. That initial sibilant is unusually distinctive in environmental noise, which means dogs lock onto it faster than they do onto names starting with softer consonants. The name is also a single syllable with a clean vowel-S landing, which hits every box in the dog-training literature on name selection. Owners did not pick it for this reason, but the engineering works in their favor.
For comparison, Rex uses the same one-syllable hard-consonant logic from a different angle. Zeus is what you pick when you want the same recall properties with more cultural weight attached.
The human name barely registers
Unlike most pet names in the top 100, Zeus has almost no presence on the SSA baby-name charts. That is unusual and worth flagging. The name lives almost entirely in the pet world, which makes it one of the cleanest pet-only choices in the rankings. The baby name page shows just how thin the human side is. Browse the full pet rankings for adjacent mythological picks.