Caspar vs Rein

Baby Name Comparison — 2026

Caspar

Boy #6,197 Most Popular 2 Syllables

Meaning

"treasurer, keeper of treasure"

Origin: Persian

Cultural Roots

German Dutch Scandinavian English

Quick Stats

Popularity Rank
#6,197
Total SSA Count
15
Syllables
2
Formality
Moderate
Nicknames
Cas, Caz

Playground Safety Score

✓ All Clear
Full profile for Caspar →

Popularity Comparison

Caspar Rank #6,197
Rein Rank #6,296

Caspar is more popular, ranked #6197 vs #6296 for Rein.

Popularity Over Time

Historical US popularity rank — lower number means more popular.

Middle Name Pairings

Caspar ___

  • Caspar James
  • Caspar William
  • Caspar Henry
  • Caspar Frederick
  • Caspar August

Rein ___

  • Rein James
  • Rein Thomas
  • Rein August
  • Rein Willem
  • Rein Henrik
  • Rein Pieter

Sibling Name Ideas

Names that pair well as siblings.

If you choose Caspar

Balthazar Felix Cecily Imogen Hugo

If you choose Rein

Sven Lars Anya Lore Toon

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 Caspar or Rein more popular?

Caspar is more popular, ranked #6197 compared to Rein at #6296 in the United States.

What do Caspar and Rein mean?

Caspar means "treasurer, keeper of treasure" (Persian origin). Rein means "pure, clean" (Germanic rein- origin).

Are Caspar and Rein boy or girl names?

Caspar is primarily a boy name. Rein is primarily a boy name.

More Comparisons

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← Full profile: Caspar ← Full profile: Rein Browse all baby names