Sir vs Cai

Baby Name Comparison — 2026

Sir

Boy #1,964 Most Popular 1 Syllable

"lord, master"

Origin: Old French

American English Caribbean

✓ All Clear

Boy #1,906 Most Popular 1 Syllable

"rejoice, delight"

Origin: Latin via Welsh

Welsh Chinese English

✓ All Clear

Sir Rank #1,964

Cai Rank #1,906

Cai is more popular, ranked #1906 vs #1964 for Sir.

Is Sir or Cai more popular?

Cai is more popular, ranked #1906 compared to Sir at #1964 in the United States.

What do Sir and Cai mean?

Sir means "lord, master" (Old French origin). Cai means "rejoice, delight" (Latin via Welsh origin).

Are Sir and Cai boy or girl names?

Sir is primarily a boy name. Cai is primarily a boy name.