Casen vs Rex

Baby Name Comparison — 2026

Popularity Comparison

Casen Rank #794
Rex Rank #793

Rex is more popular, ranked #793 vs #794 for Casen.

Frequently Asked Questions

Is Casen or Rex more popular?

Rex is more popular, ranked #793 compared to Casen at #794 in the United States.

What do Casen and Rex mean?

Casen means "alert, watchful" (Irish Gaelic origin). Rex means "king" (Latin origin).

Are Casen and Rex boy or girl names?

Casen is primarily a boy name. Rex is primarily a boy name.

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← Full profile: Casen ← Full profile: Rex Browse all baby names