Callister vs Castyn

Baby Name Comparison — 2026

Callister

Boy #43,579 Most Popular 3 Syllables

Meaning

"defender of men"

Origin: Greek via Gaelic

Cultural Roots

Scottish Manx Irish

Quick Stats

Popularity Rank: #43,579
Total SSA Count: 5
Syllables: 3
Formality: Moderate
Nicknames: Cal, Cali

Playground Safety Score

✓ All Clear

Similar Names

Bae Ameire Abdikhaliq Addix

Full profile for Callister →

Castyn

Boy #43,693 Most Popular

Quick Stats

Popularity Rank: #43,693
Total SSA Count: 5
Nicknames: Cas, Cast, Casty

Playground Safety Score

✓ All Clear

Similar Names

Aquinas Addix Aharshi Capp

Full profile for Castyn →

Popularity Comparison

Callister Rank #43,579

Castyn Rank #43,693

Callister is more popular, ranked #43579 vs #43693 for Castyn.

Popularity Over Time

Historical US popularity rank — lower number means more popular.

Middle Name Pairings

Callister ___

Callister James
Callister Robert
Callister Alexander
Callister William
Callister Andrew
Callister Thomas

Castyn ___

No pairings available yet.

Sibling Name Ideas

Names that pair well as siblings.

If you choose Callister

Angus Ewan Hamish Catriona Fiona

If you choose Castyn

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 Callister or Castyn more popular?

Callister is more popular, ranked #43579 compared to Castyn at #43693 in the United States.

What do Callister and Castyn mean?

Callister means "defender of men" (Greek via Gaelic origin).

Are Callister and Castyn boy or girl names?

Callister is primarily a boy name. Castyn is primarily a boy name.

More Comparisons

Castyn vs Callister Callister vs Bae Callister vs Ameire Callister vs Abdikhaliq Callister vs Addix

← Full profile: Callister ← Full profile: Castyn Browse all baby names