Aldo vs Guillermo

Baby Name Comparison — 2026

Aldo

Boy #995 Most Popular 2 Syllables

Meaning

"old, wise, of noble birth"

Origin: Old High German

Cultural Roots

Italian German Spanish English

Quick Stats

Popularity Rank
#995
Total SSA Count
226
Syllables
2
Formality
Moderate

Playground Safety Score

✓ All Clear
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Guillermo

Boy #833 Most Popular 3 Syllables

Meaning

"resolute protector"

Origin: Old High German wil (will) + helm (protection)

Cultural Roots

Spanish Latin American Filipino Portuguese

Quick Stats

Popularity Rank
#833
Total SSA Count
297
Syllables
3
Formality
Formal
Nicknames
Memo, Guille, Willy

Playground Safety Score

✓ All Clear
Full profile for Guillermo →

Popularity Comparison

Aldo Rank #995
Guillermo Rank #833

Guillermo is more popular, ranked #833 vs #995 for Aldo.

Popularity Over Time

Historical US popularity rank — lower number means more popular.

Middle Name Pairings

Aldo ___

  • Aldo James
  • Aldo Marco
  • Aldo Luis
  • Aldo Giovanni
  • Aldo Rafael
  • Aldo Matteo

Guillermo ___

  • Guillermo Alejandro
  • Guillermo Antonio
  • Guillermo Eduardo
  • Guillermo Rafael
  • Guillermo Miguel
  • Guillermo Carlos

Sibling Name Ideas

Names that pair well as siblings.

If you choose Aldo

Bruno Marco Dante Luciana Valentina

If you choose Guillermo

Fernando Ricardo Alejandra Lucia Isabella

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 Aldo or Guillermo more popular?

Guillermo is more popular, ranked #833 compared to Aldo at #995 in the United States.

What do Aldo and Guillermo mean?

Aldo means "old, wise, of noble birth" (Old High German origin). Guillermo means "resolute protector" (Old High German wil (will) + helm (protection) origin).

Are Aldo and Guillermo boy or girl names?

Aldo is primarily a boy name. Guillermo is primarily a boy name.

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← Full profile: Aldo ← Full profile: Guillermo Browse all baby names