Isadore vs Theodore

Baby Name Comparison — 2026

Popularity Comparison

Isadore Rank #9,340
Theodore Rank #4

Theodore is more popular, ranked #4 vs #9340 for Isadore.

Popularity Over Time

Historical US popularity rank — lower number means more popular.

Middle Name Pairings

Isadore ___

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 Isadore

No sibling data available yet.

If you choose Theodore

Olivia Charlotte Amelia Eleanor Oliver

Which Name Fits Your Family?

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1. Which style feels more like your family?

Frequently Asked Questions

Is Isadore or Theodore more popular?

Theodore is more popular, ranked #4 compared to Isadore at #9340 in the United States.

What do Isadore and Theodore mean?

Theodore means "divine gift" (Greek origin).

Are Isadore and Theodore boy or girl names?

Isadore is primarily a boy name. Theodore is primarily a boy name.

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