Costello vs Theodore

Baby Name Comparison — 2026

Costello

Boy #30,452 Most Popular

Quick Stats

Popularity Rank: #30,452
Total SSA Count: 5
Nicknames: Cos, Cost, Costy

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Similar Names

Donlad Lito Jarry

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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

Josiah Daniel Bryson Declan

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Popularity Comparison

Costello Rank #30,452

Theodore Rank #4

Theodore is more popular, ranked #4 vs #30452 for Costello.

Popularity Over Time

Historical US popularity rank — lower number means more popular.

Middle Name Pairings

Costello ___

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 Costello

No sibling data available yet.

If you choose Theodore

Olivia Charlotte Amelia Eleanor Oliver

Which Name Fits Your Family?

Answer 3 quick questions and we'll help you decide.

1. Which style feels more like your family?

Frequently Asked Questions

Is Costello or Theodore more popular?

Theodore is more popular, ranked #4 compared to Costello at #30452 in the United States.

What do Costello and Theodore mean?

Theodore means "divine gift" (Greek origin).

Are Costello and Theodore boy or girl names?

Costello is primarily a boy name. Theodore is primarily a boy name.

More Comparisons

Theodore vs Costello Costello vs Donlad Costello vs Lito Costello vs Jarry Costello vs Josiah

← Full profile: Costello ← Full profile: Theodore Browse all baby names