Cynthia vs Sidney

Baby Name Comparison — 2026

Cynthia

Girl #827 Most Popular 3 Syllables

"woman from Mount Cynthus"

Origin: Greek

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Girl #1,726 Most Popular 2 Syllables

"wide island"

Origin: Old English

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✓ All Clear

Cynthia Rank #827

Sidney Rank #1,726

Cynthia is more popular, ranked #827 vs #1726 for Sidney.

Is Cynthia or Sidney more popular?

Cynthia is more popular, ranked #827 compared to Sidney at #1726 in the United States.

What do Cynthia and Sidney mean?

Cynthia means "woman from Mount Cynthus" (Greek origin). Sidney means "wide island" (Old English origin).

Are Cynthia and Sidney boy or girl names?

Cynthia is primarily a girl name. Sidney is primarily a girl name.