Reilly vs Theodore

Baby Name Comparison — 2026

Popularity Comparison

Reilly Rank #2,728
Theodore Rank #4

Theodore is more popular, ranked #4 vs #2728 for Reilly.

Popularity Over Time

Historical US popularity rank — lower number means more popular.

Middle Name Pairings

Reilly ___

  • Reilly Grace
  • Reilly Ann
  • Reilly Mae
  • Reilly Kate
  • Reilly Claire
  • Reilly Rose

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 Reilly

Finn Caitlin Declan Sienna Aidan

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 Reilly or Theodore more popular?

Theodore is more popular, ranked #4 compared to Reilly at #2728 in the United States.

What do Reilly and Theodore mean?

Reilly means "courageous, valiant" (Irish Gaelic origin). Theodore means "divine gift" (Greek origin).

Are Reilly and Theodore boy or girl names?

Reilly is primarily a girl name. Theodore is primarily a boy name.

More Comparisons

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