Fiona vs Theodore

Baby Name Comparison — 2026

Popularity Comparison

Fiona Rank #406
Theodore Rank #4

Theodore is more popular, ranked #4 vs #406 for Fiona.

Popularity Over Time

Historical US popularity rank — lower number means more popular.

Middle Name Pairings

Fiona ___

  • Fiona Rose
  • Fiona Grace
  • Fiona Claire
  • Fiona Jane
  • Fiona Maeve
  • Fiona Kate

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 Fiona

Seamus Aoife Declan Siobhan Finley

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 Fiona or Theodore more popular?

Theodore is more popular, ranked #4 compared to Fiona at #406 in the United States.

What do Fiona and Theodore mean?

Fiona means "fair, white, pure" (Scottish Gaelic origin). Theodore means "divine gift" (Greek origin).

Are Fiona and Theodore boy or girl names?

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

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