Sullivan vs Lydia

Baby Name Comparison — 2026

Sullivan

Boy #340 Most Popular 3 Syllables

"descendant of the dark one"

Origin: Irish Gaelic

Irish American English

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Girl #97 Most Popular 3 Syllables

"beautiful one, noble"

Origin: Greek

English Greek German Scandinavian

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Sullivan Rank #340

Lydia Rank #97

Lydia is more popular, ranked #97 vs #340 for Sullivan.

Is Sullivan or Lydia more popular?

Lydia is more popular, ranked #97 compared to Sullivan at #340 in the United States.

What do Sullivan and Lydia mean?

Sullivan means "descendant of the dark one" (Irish Gaelic origin). Lydia means "beautiful one, noble" (Greek origin).

Are Sullivan and Lydia boy or girl names?

Sullivan is primarily a boy name. Lydia is primarily a girl name.