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Guillermo Meaning


Quick Facts







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Origin & Meaning

The name Guillermo is of Spanish origin.

The meaning of Guillermo is "determined protector".  


In the U.S. in 2014, it ranked 678 in baby name popularity for boys with 372 occurrences.    Less than 5 girls were given the name. 

View the Guillermo Name Popularity Page to see how the popularity trend for Guillermo has changed since 1880, or to compare the popularity of Guillermo to other names.


Introduced to Britain by the Normans, the name William is an Anglicized form of the German name Wilhelm.

It is derived from the Germanic elements Wil meaning "will or determination" and helm meaning "helmet or protection, guardian".

One of a number of names introduced to Britain by the Normans, William was and still remains one of the most popular names in Britain. It was the most common boy name in the first century after the Conquest, and was second only to the name John during the Middle Ages.

The name William is used by the royal families of Britain, Germany and the Netherlands.

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What will your new little Guillermo be like?

It may all be in the numbers.

The numbers that make up your child's name.

Children named Guillermo are often definite and ethical but most of all they are  read more >>

Related Names

Guillermo is a form of the name William.

Other Tidbits

Some famous bearers of this name include: Guillermo Canas, Guillermo Vilas.

Name Fun

Would you like to fingerspell the name Guillermo in American Sign Language?

Then just follow the diagram below.

Be creative with the name Guillermo.

Just for fun, see the name Guillermo in Hieroglyphics, learn about ancient Egyptian Hieroglyphics and write a Hieroglyphic message.

Learn about nautical flags and see your name or message written in nautical flags, on the Guillermo in Nautical Flags page.

Names Like This

Spanish names consist of one or more given names followed by TWO family names. Generally the first surname is the father's first surname and the second is the mother's first surname but this traditional order no longer required. Generally the second surname is only used for formal and legal matters.

Although a child may have only one or two given names for official civil records, they may be given several names when baptized.

Given names are simple such as Juan or composite such as Juan Pablo. Composite names are considered single unit first names and not first and second names.

Parents give names that just appeal to them, honor relatives or saints, or are of traditional Spanish origin.

Many Spanish given names honor the Virgin Mary. Girls are frequently given the name Maria or Maria followed by a suffix name and boys are sometimes given the name Maria as a middle name. Girls with Marian composite names may use the suffix portion of their name as their main informal name. For example Maria de los Angeles, Maria del Pilar and Maria de la Luz, may go by the names Angeles, Pilar and Luz.

Although the first name within a composite name generally reflects the gender of the holder, the second name need not, as in Jose Maria or Maria Jose.