Hanna is the single-N spelling variant of Hannah — a name with deep Biblical roots (it means grace or favor in Hebrew) and centuries of steady use across cultures. At rank 1288 in the pet registry, the single-N version appears alongside the more conventional double-N spelling, and the split probably reflects owner spelling preference rather than any meaningful naming distinction.
Registry Spelling Variation
Hannah and Hanna coexist in the registry as they do in human naming, where both spellings have tracked in the SSA data for decades. For a pet, neither carries more weight than the other — the name itself is what matters. The human name research at /names/hanna covers the etymology in more detail. Worth flagging that in Scandinavian countries, Hanna (single N) is actually the more common form.
A Name That Works Across Contexts
Hannah/Hanna has a reliable, gentle quality that suits a wide range of dogs. It's not strongly associated with any particular breed or size — it works on a Labrador as naturally as on a Shih Tzu. That versatility is a genuine asset. The name won't confuse anyone, doesn't need explaining, and ages well as the dog grows from puppy to senior.
The Counter-Reading
Hanna is so established as a human name that some owners feel it's not distinctive enough for a pet — it blurs the human-animal naming distinction in a way that more unusual pet names don't. Compare Hazel or Harriet if you want the same H-opening warmth with slightly more character. Otherwise, Hanna is a quiet, reliable classic.