Dillan vs Theodore

Baby Name Comparison — 2026

Dillan

Boy #2,887 Most Popular 2 Syllables

Meaning

"great tide, sea flow"

Origin: Welsh

Cultural Roots

Welsh English Irish American

Quick Stats

Popularity Rank
#2,887
Total SSA Count
44
Syllables
2
Formality
Moderate
Nicknames
Dill

Playground Safety Score

✓ All Clear
Full profile for Dillan →

Popularity Comparison

Dillan Rank #2,887
Theodore Rank #4

Theodore is more popular, ranked #4 vs #2887 for Dillan.

Popularity Over Time

Historical US popularity rank — lower number means more popular.

Middle Name Pairings

Dillan ___

  • Dillan James
  • Dillan Lee
  • Dillan Thomas
  • Dillan Michael
  • Dillan Owen
  • Dillan Rhys

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 Dillan

Brennan Kieran Declan Sienna Bryn

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 Dillan or Theodore more popular?

Theodore is more popular, ranked #4 compared to Dillan at #2887 in the United States.

What do Dillan and Theodore mean?

Dillan means "great tide, sea flow" (Welsh origin). Theodore means "divine gift" (Greek origin).

Are Dillan and Theodore boy or girl names?

Dillan is primarily a boy name. Theodore is primarily a boy name.

More Comparisons

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