German appearing as a pet name at rank 3120 is almost certainly a registry artifact in most cases: "German Shepherd" truncated to the breed name's first word, or an owner who entered the dog's breed in the name field. That said, German is a real given name — Germanic in origin, related to germanus meaning "brother" or "genuine" — used in Spanish-speaking countries as a given name.
The Registry Artifact Pattern
"German," "Shepherd," "Retriever," "Poodle" — breed descriptors turn up in licensing data regularly when owners fill fields with whatever comes to mind. "German" most plausibly represents German Shepherd owners who entered partial breed information. This is a well-documented pattern in municipal dog licensing databases. Browse properly named dogs at pet names.
When It's a Real Name
Germán (with accent) is a Spanish-language given name in active use in Mexico, Argentina, and Colombia. For a Latino owner, naming a dog Germán as a human name is entirely plausible — it's their equivalent of naming a dog Carlos or Miguel. German Shepherds named Germán would be a delightful breed-name coincidence. The human name German has modest US usage in Latino communities.
The Counter-Reading: Nationality Reading
To most American ears, "German" reads as an adjective before it reads as a name. That immediate association requires a brief reframe in conversation.