Agustin vs Guillermo

Baby Name Comparison — 2026

Agustin

Boy #867 Most Popular 3 Syllables

Meaning

"to increase, augur"

Origin: Latin

Cultural Roots

Spanish Latin American Argentine Portuguese

Quick Stats

Popularity Rank
#867
Total SSA Count
277
Syllables
3
Formality
Formal
Nicknames
Agus, Tino, Gus

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

Agustin Rank #867
Guillermo Rank #833

Guillermo is more popular, ranked #833 vs #867 for Agustin.

Popularity Over Time

Historical US popularity rank — lower number means more popular.

Middle Name Pairings

Agustin ___

  • Agustin Alejandro
  • Agustin Carlos
  • Agustin Jose
  • Agustin Manuel
  • Agustin Rafael
  • Agustin Ignacio

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 Agustin

Emilio Sebastian Valentina Camila Matias

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 Agustin or Guillermo more popular?

Guillermo is more popular, ranked #833 compared to Agustin at #867 in the United States.

What do Agustin and Guillermo mean?

Agustin means "to increase, augur" (Latin origin). Guillermo means "resolute protector" (Old High German wil (will) + helm (protection) origin).

Are Agustin and Guillermo boy or girl names?

Agustin is primarily a boy name. Guillermo is primarily a boy name.

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