Cai vs Merlin

Baby Name Comparison — 2026

Cai

Boy #1,906 Most Popular 1 Syllable

"rejoice, delight"

Origin: Latin via Welsh

Welsh Chinese English

✓ All Clear

Boy #2,083 Most Popular 2 Syllables

"sea fortress"

Origin: Brittonic/Welsh

Welsh English French Medieval

✓ All Clear

Cai Rank #1,906

Merlin Rank #2,083

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

Is Cai or Merlin more popular?

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

What do Cai and Merlin mean?

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

Are Cai and Merlin boy or girl names?

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