Isabelle vs Theodore

Baby Name Comparison — 2026

Popularity Comparison

Isabelle Rank #171
Theodore Rank #4

Theodore is more popular, ranked #4 vs #171 for Isabelle.

Popularity Over Time

Historical US popularity rank — lower number means more popular.

Middle Name Pairings

Isabelle ___

  • Isabelle Rose
  • Isabelle Claire
  • Isabelle Grace
  • Isabelle Marie
  • Isabelle Anne
  • Isabelle Elise

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 Isabelle

Olivier Hugo Mathis Charlotte Amalie

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 Isabelle or Theodore more popular?

Theodore is more popular, ranked #4 compared to Isabelle at #171 in the United States.

What do Isabelle and Theodore mean?

Isabelle means "devoted to God" (Hebrew origin). Theodore means "divine gift" (Greek origin).

Are Isabelle and Theodore boy or girl names?

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

More Comparisons

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