Arnoldo vs Caio

Baby Name Comparison — 2026

Arnoldo

Boy #3,750 Most Popular 3 Syllables

Meaning

"eagle ruler, eagle power"

Origin: Old High German

Cultural Roots

Italian Spanish Latin American German

Quick Stats

Popularity Rank
#3,750
Total SSA Count
30
Syllables
3
Formality
Moderate
Nicknames
Arn, Arno, Noldo

Playground Safety Score

✓ All Clear
Full profile for Arnoldo →

Caio

Boy #3,730 Most Popular 3 Syllables

Meaning

"to rejoice, to be glad"

Origin: Latin

Cultural Roots

Brazilian Portuguese Italian Roman

Quick Stats

Popularity Rank
#3,730
Total SSA Count
30
Syllables
3
Formality
Moderate
Nicknames
Kai, Ca

Playground Safety Score

✓ All Clear
Full profile for Caio →

Popularity Comparison

Arnoldo Rank #3,750
Caio Rank #3,730

Caio is more popular, ranked #3730 vs #3750 for Arnoldo.

Popularity Over Time

Historical US popularity rank — lower number means more popular.

Middle Name Pairings

Arnoldo ___

  • Arnoldo Luis
  • Arnoldo Miguel
  • Arnoldo Antonio
  • Arnoldo José
  • Arnoldo Carlos
  • Arnoldo Manuel

Caio ___

  • Caio Alexandre
  • Caio Felipe
  • Caio Henrique
  • Caio Lucas
  • Caio Rafael
  • Caio Miguel

Sibling Name Ideas

Names that pair well as siblings.

If you choose Arnoldo

Rinaldo Armando Rolando Carla Giulia

If you choose Caio

Enzo Mateus Pedro Giovanna Isadora

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 Arnoldo or Caio more popular?

Caio is more popular, ranked #3730 compared to Arnoldo at #3750 in the United States.

What do Arnoldo and Caio mean?

Arnoldo means "eagle ruler, eagle power" (Old High German origin). Caio means "to rejoice, to be glad" (Latin origin).

Are Arnoldo and Caio boy or girl names?

Arnoldo is primarily a boy name. Caio is primarily a boy name.

More Comparisons

Caio vs Arnoldo Arnoldo vs Rhylan Arnoldo vs Lion Arnoldo vs Yadier Arnoldo vs Kendal
← Full profile: Arnoldo ← Full profile: Caio Browse all baby names