Cailyn vs Dillon

Baby Name Comparison — 2026

Cailyn

Girl #3,286 Most Popular 2 Syllables

Meaning

"pure"

Origin: Greek via Irish

Cultural Roots

Irish American Scottish

Quick Stats

Popularity Rank
#3,286
Total SSA Count
48
Syllables
2
Formality
Moderate
Nicknames
Cay, Cai, Linny

Playground Safety Score

✓ All Clear
Full profile for Cailyn →

Dillon

Boy #870 Most Popular 2 Syllables

Meaning

"great tide, son of the sea"

Origin: Welsh

Cultural Roots

Irish Welsh American English

Quick Stats

Popularity Rank
#870
Total SSA Count
276
Syllables
2
Formality
Casual
Nicknames
Dil, Dilly

Playground Safety Score

✓ All Clear
Full profile for Dillon →

Popularity Comparison

Cailyn Rank #3,286
Dillon Rank #870

Dillon is more popular, ranked #870 vs #3286 for Cailyn.

Popularity Over Time

Historical US popularity rank — lower number means more popular.

Middle Name Pairings

Cailyn ___

  • Cailyn Rose
  • Cailyn Marie
  • Cailyn Grace
  • Cailyn Elizabeth
  • Cailyn Ann
  • Cailyn Jean

Dillon ___

  • Dillon James
  • Dillon Ray
  • Dillon Cole
  • Dillon Scott
  • Dillon Wayne
  • Dillon Lee

Sibling Name Ideas

Names that pair well as siblings.

If you choose Cailyn

Declan Saoirse Ronan Fiona Aidan

If you choose Dillon

Connor Liam Shannon Erin Brady

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 Cailyn or Dillon more popular?

Dillon is more popular, ranked #870 compared to Cailyn at #3286 in the United States.

What do Cailyn and Dillon mean?

Cailyn means "pure" (Greek via Irish origin). Dillon means "great tide, son of the sea" (Welsh origin).

Are Cailyn and Dillon boy or girl names?

Cailyn is primarily a girl name. Dillon is primarily a boy name.

More Comparisons

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