Harold vs Kaius

Baby Name Comparison — 2026

Harold

Boy #991 Most Popular 2 Syllables

Meaning

"army ruler, power of the army"

Origin: Old English

Cultural Roots

English Scandinavian American

Quick Stats

Popularity Rank
#991
Total SSA Count
227
Syllables
2
Formality
Formal
Nicknames
Harry, Hal

Playground Safety Score

✓ All Clear
Full profile for Harold →

Kaius

Boy #1,137 Most Popular 3 Syllables

Meaning

"rejoice, be glad"

Origin: Latin

Cultural Roots

Latin Scandinavian Finnish

Quick Stats

Popularity Rank
#1,137
Total SSA Count
186
Syllables
3
Formality
Moderate
Nicknames
Kai

Playground Safety Score

✓ All Clear
Full profile for Kaius →

Popularity Comparison

Harold Rank #991
Kaius Rank #1,137

Harold is more popular, ranked #991 vs #1137 for Kaius.

Popularity Over Time

Historical US popularity rank — lower number means more popular.

Middle Name Pairings

Harold ___

  • Harold James
  • Harold Edward
  • Harold Thomas
  • Harold Francis
  • Harold David
  • Harold William

Kaius ___

  • Kaius Alexander
  • Kaius James
  • Kaius Elliot
  • Kaius Arthur
  • Kaius Reid
  • Kaius Finn

Sibling Name Ideas

Names that pair well as siblings.

If you choose Harold

Dorothy Mildred Walter Bernard Margaret

If you choose Kaius

Callum Leona Aurora Finn Cassius

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 Harold or Kaius more popular?

Harold is more popular, ranked #991 compared to Kaius at #1137 in the United States.

What do Harold and Kaius mean?

Harold means "army ruler, power of the army" (Old English origin). Kaius means "rejoice, be glad" (Latin origin).

Are Harold and Kaius boy or girl names?

Harold is primarily a boy name. Kaius is primarily a boy name.

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