Kaj vs Mathius

Baby Name Comparison — 2026

Kaj

Boy #6,083 Most Popular 1 Syllable

Meaning

"to rejoice"

Origin: Latin (Caius/Gaius)

Cultural Roots

Danish Swedish Norwegian German

Quick Stats

Popularity Rank
#6,083
Total SSA Count
15
Syllables
1
Formality
Moderate

Playground Safety Score

All Clear

Mathius

Boy #5,888 Most Popular 3 Syllables

Meaning

"gift of God"

Origin: Hebrew

Cultural Roots

German Scandinavian English Christian Dutch

Quick Stats

Popularity Rank
#5,888
Total SSA Count
16
Syllables
3
Formality
Formal
Nicknames
Matt, Mat

Playground Safety Score

All Clear

Popularity Comparison

Kaj Rank #6,083
Mathius Rank #5,888

Mathius is more popular, ranked #5888 vs #6083 for Kaj.

Popularity Over Time

Historical US popularity rank — lower number means more popular.

Middle Name Pairings

Kaj ___

  • Kaj Erik
  • Kaj Lars
  • Kaj Wilhelm
  • Kaj Gustav
  • Kaj Magnus
  • Kaj Nils

Mathius ___

  • Mathius James
  • Mathius John
  • Mathius Samuel
  • Mathius Joseph
  • Mathius Alexander
  • Mathius David

Sibling Name Ideas

Names that pair well as siblings.

If you choose Kaj

Signe Astrid Leif Bjorn Sigrid

If you choose Mathius

Tobias Elias Lucas Jonas Miriam

Which Name Fits Your Family?

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1. Which style feels more like your family?

Frequently Asked Questions

Is Kaj or Mathius more popular?

Mathius is more popular, ranked #5888 compared to Kaj at #6083 in the United States.

What do Kaj and Mathius mean?

Kaj means "to rejoice" (Latin (Caius/Gaius) origin). Mathius means "gift of God" (Hebrew origin).

Are Kaj and Mathius boy or girl names?

Kaj is primarily a boy name. Mathius is primarily a boy name.

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