Erich vs Kaj

Baby Name Comparison — 2026

Erich

Boy #5,905 Most Popular 2 Syllables

Meaning

"eternal ruler, ever powerful"

Origin: Old Norse via Germanic

Cultural Roots

German Austrian Scandinavian Swiss American

Quick Stats

Popularity Rank
#5,905
Total SSA Count
16
Syllables
2
Formality
Formal
Nicknames
Rich, Rick

Playground Safety Score

✓ All Clear
Full profile for Erich →

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
Full profile for Kaj →

Popularity Comparison

Erich Rank #5,905
Kaj Rank #6,083

Erich is more popular, ranked #5905 vs #6083 for Kaj.

Popularity Over Time

Historical US popularity rank — lower number means more popular.

Middle Name Pairings

Erich ___

  • Erich Wilhelm
  • Erich Karl
  • Erich Hans
  • Erich Friedrich
  • Erich Heinrich
  • Erich August

Kaj ___

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

Sibling Name Ideas

Names that pair well as siblings.

If you choose Erich

Klaus Dieter Helmut Gerda Ilse

If you choose Kaj

Signe Astrid Leif Bjorn Sigrid

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 Erich or Kaj more popular?

Erich is more popular, ranked #5905 compared to Kaj at #6083 in the United States.

What do Erich and Kaj mean?

Erich means "eternal ruler, ever powerful" (Old Norse via Germanic origin). Kaj means "to rejoice" (Latin (Caius/Gaius) origin).

Are Erich and Kaj boy or girl names?

Erich is primarily a boy name. Kaj is primarily a boy name.

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← Full profile: Erich ← Full profile: Kaj Browse all baby names