Castian vs Theodore

Baby Name Comparison — 2026

Popularity Comparison

Castian Rank #15,778
Theodore Rank #4

Theodore is more popular, ranked #4 vs #15778 for Castian.

Popularity Over Time

Historical US popularity rank — lower number means more popular.

Middle Name Pairings

Castian ___

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 Castian

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 Castian or Theodore more popular?

Theodore is more popular, ranked #4 compared to Castian at #15778 in the United States.

What do Castian and Theodore mean?

Theodore means "divine gift" (Greek origin).

Are Castian and Theodore boy or girl names?

Castian is primarily a boy name. Theodore is primarily a boy name.

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