Boy Name
Gillermo
Gillermo is a boy's name whose meaning is not firmly attested in the historical record. It is used as a boy's name across several naming traditions, and it is rare in the United States today — outside the SSA top 1,000.
Gillermo is a boy baby name. It currently sits in the Rare tier of US baby names for 2026, and parents who love Gillermo often also consider Guillermo.
Gillermo meaning, origin, and usage
Meaning: Gillermo has a distinctive sound and evolving modern usage.
Origin: Multiple naming traditions are associated with this name.
Pronunciation: Baby Name Studio pronounces Gillermo as G·I·L·L·E·R·M·O, with 8 letters and a boy usage profile.
Popularity: According to Baby Name Studio's 2026 tracker, Gillermo is an uncommon, standout choice in the Rare tier.
Gillermo variants, nicknames, middle names, and sibling names
- Variants and spelling ideas: Gillermoa, Gillermoe, Gillermoy, Gillerm.
- Nicknames: Gill and G.
- Middle names: Pair Gillermo with a middle name that balances its substantial sound; start with the Gillermo middle name generator.
- Sibling names: Guillermo, Giacomo, Guillermina, Geronimo, Gilmore — full picks on the sibling names for Gillermo guide for a cohesive sibset.
- Similar names: Looking for names that sound like Gillermo? Browse our names like Gillermo guide for phonetic-neighbor picks.
- Explore more: use the Baby Name Explorer, name search, AI name generator, and Baby Name Studio homepage.
Frequently asked about Gillermo
What does the name Gillermo mean?
Gillermo has no single meaning that is firmly attested in the historical record. It is used as a boy name in US birth records, and parents usually choose it for its sound rather than a documented meaning.
What is the origin of Gillermo?
The exact origin of Gillermo is debated, but it has been used across multiple naming traditions.
How do you pronounce Gillermo?
Gillermo has 8 letters and is most commonly stressed on the first syllable.
Is Gillermo a boy's or girl's name?
Gillermo is primarily used as a boy's name in US records.
How popular is Gillermo in 2026?
In our 2026 popularity tracker, Gillermo sits in the Rare tier — an uncommon, standout choice.
What names are similar to Gillermo?
Names that share Gillermo's sound and style include Guillermo, Giacomo, Guillermina, Geronimo, Gilmore.
What middle names pair well with Gillermo?
Good middle-name fits for Gillermo pair an opposite syllable rhythm: if Gillermo is short, lean longer (e.g. classical or three-syllable middles); if Gillermo is longer, a one-syllable middle keeps the full name from feeling heavy.
What are good sibling names for Gillermo?
Sibling names that pair naturally with Gillermo share its rhythm without rhyming — Guillermo, Giacomo, Guillermina all sit comfortably alongside it on a shortlist.