Callyn vs Mo

Baby Name Comparison — 2026

Callyn

Girl #4,213 Most Popular 2 Syllables

Meaning

"slender, narrow"

Origin: Irish Gaelic

Cultural Roots

American Irish English

Quick Stats

Popularity Rank
#4,213
Total SSA Count
34
Syllables
2
Formality
Moderate
Nicknames
Cal, Cally, Lynn

Playground Safety Score

✓ All Clear
Full profile for Callyn →

Popularity Comparison

Callyn Rank #4,213
Mo Rank #17,973

Callyn is more popular, ranked #4213 vs #17973 for Mo.

Popularity Over Time

Historical US popularity rank — lower number means more popular.

Middle Name Pairings

Callyn ___

  • Callyn Marie
  • Callyn Grace
  • Callyn Rose
  • Callyn Anne
  • Callyn Jane
  • Callyn Faith

Mo ___

No pairings available yet.

Sibling Name Ideas

Names that pair well as siblings.

If you choose Callyn

Fallyn Braelyn Maelyn Hollyn Graylyn

If you choose Mo

No sibling data available yet.

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 Callyn or Mo more popular?

Callyn is more popular, ranked #4213 compared to Mo at #17973 in the United States.

What do Callyn and Mo mean?

Callyn means "slender, narrow" (Irish Gaelic origin).

Are Callyn and Mo boy or girl names?

Callyn is primarily a girl name. Mo is primarily a girl name.

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← Full profile: Callyn ← Full profile: Mo Browse all baby names