Millie vs Theodore

Baby Name Comparison — 2026

Millie

Girl #86 Most Popular 2 Syllables

Meaning

"strength, work"

Origin: Old Germanic (diminutive of Millicent)

Cultural Roots

English American Australian

Quick Stats

Popularity Rank
#86
Total SSA Count
2,910
Syllables
2
Formality
Casual
Nicknames
Mills

Playground Safety Score

✓ All Clear
Full profile for Millie →

Popularity Comparison

Millie Rank #86
Theodore Rank #4

Theodore is more popular, ranked #4 vs #86 for Millie.

Popularity Over Time

Historical US popularity rank — lower number means more popular.

Middle Name Pairings

Millie ___

  • Millie Rose
  • Millie Grace
  • Millie Jane
  • Millie Mae
  • Millie Faye
  • Millie Bea

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 Millie

Daisy Dolly Maggie Freddie Archie

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 Millie or Theodore more popular?

Theodore is more popular, ranked #4 compared to Millie at #86 in the United States.

What do Millie and Theodore mean?

Millie means "strength, work" (Old Germanic (diminutive of Millicent) origin). Theodore means "divine gift" (Greek origin).

Are Millie and Theodore boy or girl names?

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

More Comparisons

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