Guillermo
From the Latin Guillelmus sit two Germanic pieces, will and helmet: a protector whose defense is a matter of resolve. In Poland the name stays foreign and rare, carried by only a few hundred men, so most Poles will never meet one.
Guillermo Pronunciation
Guillermo is pronounced goo-eel-LER-mo (/guilˈlɛrmɔ/).
What Guillermo means
Where Guillermo comes from and what it has meant to the people who carry it.
Guillermo is the Spanish form of a name that reached the Iberian Peninsula through the medieval Latin Guillelmus. Under the Latin spelling sit two older Germanic pieces: wil, meaning will, and helm, a helmet. Together they give the sense the name still holds, a resolute protector, someone whose defense is a matter of resolve.
The Latin did the moving. Scribes wrote Guillelmus and Willelmus in charters and parish registers, and Spanish softened the hard ending into the warm -ermo we know now. No diminutive crowds around it. It stands on its own.
One familiar bearer is Guillermo del Toro, the Mexican director, who has carried the name far past Spanish-speaking borders. Read down a Polish school register and it turns up now and then, plainly and without fuss.
So the meaning holds. Will and helmet, resolve and cover, a protector named for the strength of his own intent.
How many people are named Guillermo
1 in 83384 men in Poland is named Guillermo. 256 people carry it in the 2025 register: rank #1921 among male names.
Guillermo's popularity over time
Fewer than 2 boys were given the name in 2025. It has been stable for a decade.
Guillermo as a middle name
Guillermo is a first name for 256 men in Poland and a middle name for another 138, a 65/35 split. In the men's middle-name ranking it sits 599th, between Miłosław (139) and Mohammad (138).
-
#597 Orlando140
-
#598 Miłosław139
-
#599 Guillermo138
-
#600 Mohammad138
-
#601 René137