Io vs Theodore

Baby Name Comparison — 2026

Popularity Comparison

Io Rank #11,076
Theodore Rank #4

Theodore is more popular, ranked #4 vs #11076 for Io.

Popularity Over Time

Historical US popularity rank — lower number means more popular.

Middle Name Pairings

Io ___

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 Io

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 Io or Theodore more popular?

Theodore is more popular, ranked #4 compared to Io at #11076 in the United States.

What do Io and Theodore mean?

Theodore means "divine gift" (Greek origin).

Are Io and Theodore boy or girl names?

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

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