Caitlyn vs Sy

Baby Name Comparison — 2026

Caitlyn

Girl #2,348 Most Popular 2 Syllables

Meaning

"pure, unblemished"

Origin: Greek via Irish

Cultural Roots

Irish Welsh American British

Quick Stats

Popularity Rank
#2,348
Total SSA Count
78
Syllables
2
Formality
Moderate
Nicknames
Cait, Kate, Katie

Playground Safety Score

✓ All Clear
Full profile for Caitlyn →

Sy

Boy #7,533 Most Popular 1 Syllable

Meaning

"heard by God"

Origin: Hebrew

Cultural Roots

English Jewish American

Quick Stats

Popularity Rank
#7,533
Total SSA Count
11
Syllables
1
Formality
Casual
Nicknames
Sy

Playground Safety Score

✓ All Clear
Full profile for Sy →

Popularity Comparison

Caitlyn Rank #2,348
Sy Rank #7,533

Caitlyn is more popular, ranked #2348 vs #7533 for Sy.

Popularity Over Time

Historical US popularity rank — lower number means more popular.

Middle Name Pairings

Caitlyn ___

  • Caitlyn Grace
  • Caitlyn Rose
  • Caitlyn Marie
  • Caitlyn Lynn
  • Caitlyn Anne
  • Caitlyn Jane

Sy ___

  • Sy James
  • Sy Thomas
  • Sy Michael
  • Sy Allen
  • Sy Robert

Sibling Name Ideas

Names that pair well as siblings.

If you choose Caitlyn

Brendan Declan Siobhan Aoife Niamh

If you choose Sy

Al Ed Abe Sol Nate

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 Caitlyn or Sy more popular?

Caitlyn is more popular, ranked #2348 compared to Sy at #7533 in the United States.

What do Caitlyn and Sy mean?

Caitlyn means "pure, unblemished" (Greek via Irish origin). Sy means "heard by God" (Hebrew origin).

Are Caitlyn and Sy boy or girl names?

Caitlyn is primarily a girl name. Sy is primarily a boy name.

More Comparisons

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← Full profile: Caitlyn ← Full profile: Sy Browse all baby names