Willam vs Kacy

Baby Name Comparison — 2026

Willam

Boy #27,904 Most Popular

✓ All Clear

Girl #6,085 Most Popular 2 Syllables

"vigilant, watchful"

Origin: Irish Gaelic (Cathasaigh)

American Irish-American

✓ All Clear

Willam Rank #27,904

Kacy Rank #6,085

Kacy is more popular, ranked #6085 vs #27904 for Willam.

Is Willam or Kacy more popular?

Kacy is more popular, ranked #6085 compared to Willam at #27904 in the United States.

What do Willam and Kacy mean?

Kacy means "vigilant, watchful" (Irish Gaelic (Cathasaigh) origin).

Are Willam and Kacy boy or girl names?

Willam is primarily a boy name. Kacy is primarily a girl name.