Kasyn vs Sir

Baby Name Comparison — 2026

Kasyn

Boy #2,055 Most Popular 2 Syllables

"vigilant in war"

Origin: Irish

American Irish

✓ All Clear

Boy #1,964 Most Popular 1 Syllable

"lord, master"

Origin: Old French

American English Caribbean

✓ All Clear

Kasyn Rank #2,055

Sir Rank #1,964

Sir is more popular, ranked #1964 vs #2055 for Kasyn.

Is Kasyn or Sir more popular?

Sir is more popular, ranked #1964 compared to Kasyn at #2055 in the United States.

What do Kasyn and Sir mean?

Kasyn means "vigilant in war" (Irish origin). Sir means "lord, master" (Old French origin).

Are Kasyn and Sir boy or girl names?

Kasyn is primarily a boy name. Sir is primarily a boy name.