Guilhermino

resolute protector — from Guillermo
Portuguese origin · Boy name
97% boys3% girls
#1703US 2023
10Births / yr
Stable
Top 1.3%Percentile

What does Guilhermino mean and where does it come from?

Guilhermino is a diminutive form of the name Guilherme, which is the Portuguese variant of William, meaning 'resolute protector'.

Cultural significance
The name is commonly used in Portuguese-speaking countries, particularly in Brazil and Portugal.
Peak popularity
Reached #1703 in 2015 — currently #1703 in the US.
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Related Reading
Portuguese-origin baby names with timeless appeal
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What middle names flow best with Guilhermino?

Guilhermino works best with short, strong middle names — one or two syllables keep the full name from becoming a mouthful

Guilhermino Jack
One syllable · timeless choice
Guilhermino John
One syllable · timeless choice
Guilhermino Miles
One syllable · vintage charm
Guilhermino Brooks
One syllable · timeless choice
Guilhermino Quinn
One syllable · timeless choice
Guilhermino Dean
One syllable · on the rise
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Middle Names
The best middle names for Guilhermino
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How popular is Guilhermino right now?

Holding steady — currently #1703 in the US out of 135.5k tracked names

US Trend 20192023#1703 · Top 1.3%
2019
2020
2021
2022
2023
YearUS RankBirthsvs Prior Year
2023#170310stable
2022#170310stable
2021#170310stable
2020#170310stable
2019#170310
💎Guilhermino is exceptionally rare — it does not appear in US Social Security records, meaning fewer than 5 babies per year have received this name.

What are good nicknames for Guilhermino?

Common
GuiGuieGuyIno

Famous people named Guilhermino

Gd
Guilhermino de Figueiredo
A Brazilian politician and lawyer known for his contributions to local governance.
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Celebrity Names
What celebrities named their babies in 2025
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Common questions about the name Guilhermino

What does the name Guilhermino mean?
Guilhermino means "resolute protector — from Guillermo" — a name rooted in Portuguese tradition that carries both historical depth and timeless appeal. The meaning reflects values that have made this name endure across generations.
How popular is the name Guilhermino?
Guilhermino is currently a distinctive and less common name as a baby name in the US and is holding steady in popularity, a reliable classic that parents consistently choose.
What is the cultural origin of Guilhermino?
Guilhermino originates from Portuguese tradition. Portuguese names tend to carry strong cultural heritage and have spread across the world through migration, literature, and religion over centuries.
What sibling names go well with Guilhermino?
Guilhermino pairs beautifully with sibling names that share a similar Sanskrit heritage or complement its melodic and flowing sound. Names with a similar vibe create a cohesive sibling set without matching too closely.
Is Guilhermino more of a girl or boy name?
Guilhermino is primarily used as a boy name, giving it a clear, timeless character while remaining accessible to modern families.