Rees vs Kacyn

Baby Name Comparison — 2026

Rees

Boy #6,353 Most Popular 1 Syllable

"enthusiasm, ardor, passion"

Origin: Old Welsh

Welsh English British

✓ All Clear

Boy #6,406 Most Popular 2 Syllables

"vigilant, watchful"

Origin: Irish (Casey root)

American English

✓ All Clear

Rees Rank #6,353

Kacyn Rank #6,406

Rees is more popular, ranked #6353 vs #6406 for Kacyn.

Is Rees or Kacyn more popular?

Rees is more popular, ranked #6353 compared to Kacyn at #6406 in the United States.

What do Rees and Kacyn mean?

Rees means "enthusiasm, ardor, passion" (Old Welsh origin). Kacyn means "vigilant, watchful" (Irish (Casey root) origin).

Are Rees and Kacyn boy or girl names?

Rees is primarily a boy name. Kacyn is primarily a boy name.