Kacyn vs Ustin

Baby Name Comparison — 2026

Kacyn

Boy #6,406 Most Popular 2 Syllables

"vigilant, watchful"

Origin: Irish (Casey root)

American English

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Boy #6,598 Most Popular 2 Syllables

"just, righteous"

Origin: Latin

English Russian Ukrainian

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Kacyn Rank #6,406

Ustin Rank #6,598

Kacyn is more popular, ranked #6406 vs #6598 for Ustin.

Is Kacyn or Ustin more popular?

Kacyn is more popular, ranked #6406 compared to Ustin at #6598 in the United States.

What do Kacyn and Ustin mean?

Kacyn means "vigilant, watchful" (Irish (Casey root) origin). Ustin means "just, righteous" (Latin origin).

Are Kacyn and Ustin boy or girl names?

Kacyn is primarily a boy name. Ustin is primarily a boy name.