Caspian carries a double origin: the Caspian Sea, the world's largest landlocked body of water, and Prince Caspian from C.S. Lewis's Chronicles of Narnia. For a male dog, it lands in the same bracket as Atlas and Orion — grand, cartographic, slightly literary.
The Literary Fantasy Current
The Narnia connection is probably stronger than the geography for most owners. Prince Caspian was introduced in the 1951 novel as a brave, honorable heir, and the 2008 film adaptation refreshed the name's visibility. Compare it to Aslan, which comes from the same source material and sits in similar territory: recognizable to fans, obscure enough to feel distinctive to everyone else.
Breed Fit
Caspian fits large, confident breeds where the geographic scale of the name feels proportionate — Siberian Huskies, Bernese Mountain Dogs, breeds whose size gives the name room to breathe. It's also the human baby name Caspian, which has been climbing in popularity since 2010.
The Counter-Reading: Prestige Over Personality
Caspian is a name chosen for its sound and associations rather than anything specific about the dog. That's fine, but owners should know they're naming the pet for themselves as much as for the animal. At 40 registrations, it's a deliberate pick by owners who want something literary without going fully obscure.