Merlin vs Cai

Baby Name Comparison — 2026

Merlin

Boy #2,083 Most Popular 2 Syllables

"sea fortress"

Origin: Brittonic/Welsh

Welsh English French Medieval

✓ All Clear

Boy #1,906 Most Popular 1 Syllable

"rejoice, delight"

Origin: Latin via Welsh

Welsh Chinese English

✓ All Clear

Merlin Rank #2,083

Cai Rank #1,906

Cai is more popular, ranked #1906 vs #2083 for Merlin.

Is Merlin or Cai more popular?

Cai is more popular, ranked #1906 compared to Merlin at #2083 in the United States.

What do Merlin and Cai mean?

Merlin means "sea fortress" (Brittonic/Welsh origin). Cai means "rejoice, delight" (Latin via Welsh origin).

Are Merlin and Cai boy or girl names?

Merlin is primarily a boy name. Cai is primarily a boy name.