Guillermo

Guillermo - A very unique male name

Guillermo appeared on the charts for the first time in 1910 on position #509. In this article you'll learn the history of this name, statistics, see famous people named Guillermo and more.
Are you having a baby or looking to learn more about the name Guillermo? Our experts and editorial staff have gathered trends and insights for 30,000+ baby names over the last 100 years -- And on this page you will learn everything you ever wanted to know about the name Guillermo. The baby boy name Guillermo was given to 207 baby boys in 2025, ranking #927 on the national boy baby name top chart.


With that position 1 in 7,083 baby boys were given this name - making this a very unique male name according to our Popularity Score algorithm. Guillermo peaked in popularity 33 years ago in 1993 on position 356.

Famous with this name

How would you rate Guillermo, 1-5?

Guillermo is currently topping the charts in...

Did you know that popularity can vary a lot between states? Guillermo is currently topping the baby name charts in Arizona at position #436 - and is the least popular in Georgia at position #1,415.

Why care about state specific baby name charts? It could be that a name that is very popular on the national overall charts is less (or even more) popular where you live. So make sure you check out the state specific charts below and find out how popular or unique Guillermo is where you live.

---

Comment and discuss

---

Guillermo origin and meaning

Spanish, from Germanic

Spanish form of William, from Germanic wil, 'will, desire', and helm, 'helmet, protection'

Guillermo is William in Spanish dress — the Germanic 'will-helmet' name as it evolved in Spain. It has been recorded in America since 1910, peaking in 1998, and remains a staple in Spanish-speaking families, with director Guillermo del Toro as its most visible modern bearer. In English mouths it compresses; in Spanish it keeps its full four-beat music.

Attested etymology

Guillermo is a 9 letter name with 4 syllables.

To see famous people named Guillermo, pop culture references for the name Guillermo and nicknames & variations - visit Nameberry or Wikipedia.

Similar to Guillermo

We've found the following names that sound similar to Guillermo, sorted by popularity.

Gillermo / Guilherme /

---

Name statistics

Most parents-to-be know if they want a popular or unique name, and with these charts and data tables you can easily get a better understanding of how popular or unique this name is.

With a quick glance you can easily tell if this name is increasing or declining in popularity - But note that its current popularity can actually differ a lot from state to state.

Chart position per year (visualized)

Chart position per state (visualized)

Chart position per year (table view)

Chart position per state (table view)

Even more about Guillermo

These are some of the common questions you may want to have answered to know if this is the perfect name for your baby.

Is Guillermo a common or unique name?

By analyzing the number of births and frequency of this name we've determined that it's currently a very unique male name.

What is the number of syllables for the name Guillermo?

4 syllables. Why is this important? One of the things that makes a baby name sound good and have a nice rythm is the number of syllables - and especially the number of syllables along with the syllable count for your last name. A simple rule is to avoid having the same number of syllables in your first, middle and last name.

---

Pronunciation

gee-YAIR-moh · /É¡iˈjɛərmoÊŠ/
Spanish pronunciation is gee-YEHRR-moh with a rolled r; anglicised versions vary, and the data count 4 syllables where Spanish speakers usually hear 3.

Around the world

• Guillermo (Spanish) — Used as-is in Spanish
• Guilherme (Portuguese) — The Portuguese form
• William (English) — The English form of the same name
• Guillaume (French) — The French form

Spellings and nicknames

• Guilherme — The Portuguese form — a separate name in the data
• Memo — The common Spanish nickname, rarely registered alone

Nicknames: MemoWillie

Famous bearers

• Guillermo del Toro — Mexican film director known for Pan's Labyrinth and The Shape of Water (b. 1964) Contemporary

Style

InternationalClassic

Why parents choose it

For Spanish-speaking families it is William with heritage intact — classic at home in two languages.

Worth knowing

• English speakers will stumble over the spelling and the ll — expect 'Gooey-lermo' first attempts and the nickname Memo whether you plan it or not.