Decimus vs Theodore

Baby Name Comparison — 2026

Popularity Comparison

Decimus Rank #32,399
Theodore Rank #4

Theodore is more popular, ranked #4 vs #32399 for Decimus.

Popularity Over Time

Historical US popularity rank — lower number means more popular.

Middle Name Pairings

Decimus ___

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 Decimus

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 Decimus or Theodore more popular?

Theodore is more popular, ranked #4 compared to Decimus at #32399 in the United States.

What do Decimus and Theodore mean?

Theodore means "divine gift" (Greek origin).

Are Decimus and Theodore boy or girl names?

Decimus is primarily a boy name. Theodore is primarily a boy name.

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