Kastor vs Theodore

Baby Name Comparison — 2026

Kastor

Boy #25,466 Most Popular

Quick Stats

Popularity Rank: #25,466
Total SSA Count: 5
Nicknames: Kas, Kast, Kasty

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Similar Names

Kying Pierrie Seville Ared

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Theodore

Boy #4 Most Popular 3 Syllables

Meaning

"divine gift"

Origin: Greek

Cultural Roots

English French Greek

Quick Stats

Popularity Rank: #4
Total SSA Count: 12,011
Syllables: 3
Formality: Formal
Nicknames: Theo, Teddy, Ted

Playground Safety Score

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Similar Names

Joseph Wesley Isaac Micah

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Popularity Comparison

Kastor Rank #25,466

Theodore Rank #4

Theodore is more popular, ranked #4 vs #25466 for Kastor.

Popularity Over Time

Historical US popularity rank — lower number means more popular.

Middle Name Pairings

Kastor ___

No pairings available yet.

Theodore ___

Theodore James
Theodore William
Theodore Alexander
Theodore John
Theodore Henry
Theodore Arthur

Sibling Name Ideas

Names that pair well as siblings.

If you choose Kastor

No sibling data available yet.

If you choose Theodore

Olivia Charlotte Amelia Eleanor Oliver

Which Name Fits Your Family?

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1. Which style feels more like your family?

Frequently Asked Questions

Is Kastor or Theodore more popular?

Theodore is more popular, ranked #4 compared to Kastor at #25466 in the United States.

What do Kastor and Theodore mean?

Theodore means "divine gift" (Greek origin).

Are Kastor and Theodore boy or girl names?

Kastor is primarily a boy name. Theodore is primarily a boy name.

More Comparisons

Theodore vs Kastor Kastor vs Kying Kastor vs Pierrie Kastor vs Seville Kastor vs Ared

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