What origin is the name Guilelmo?

Guilelmo comes from Italian naming traditions. Names from this origin often carry meanings tied to nature, virtues or heritage.

What are good sister names for Guilelmo?

Names from the same italian tradition pair naturally with Guilelmo — for example Aria, Arianna, Gianna. You can browse more on our italian names page.

Guilelmo

Discover the meaning and origin of the name Guilelmo

Guilelmo

Boy

Italian

3 syllables

Guilelmo is an Italian boy's name meaning "Resolute protector".

Parents who choose Guilelmo pick a boy name from the Italian tradition, meaning "Resolute protector". At 8 letters it is a longer name, which leaves room for a nickname. It has 3 syllables.

Origin: Italian
Gender: Boy
Syllables: 3

Last updated 24 October 2026.

Meaning

Resolute protector

Popularity

No birth-record data (source: not in US birth records; popularity in India is not tracked)

Quick answers about Guilelmo

What does Guilelmo mean?

Guilelmo is a boy name of Italian origin meaning "Resolute protector".

How popular is Guilelmo?

We have no birth-record ranking for Guilelmo: it is not in US records, and India publishes no national name rankings. The meter above fills in as parents here view, search for and save the name.

Sister names that go with Guilelmo

Aria Arianna Gianna Valeria Sienna Bianca

How to say Guilelmo

Audio plays in browsers that support speech.

Played by your device's voice; accents vary by family and region.

Name numerology

5is the Chaldean number for Guilelmo.

Number 5 is linked with curiosity, freedom and adventure.

More names with number 5

Numerology is a cultural tradition for fun, not a prediction.

Combine Guilelmo with another name

Our free name combiner blends two names into new baby name ideas.

Names with a similar meaning to Guilelmo

Guilelmo means "Resolute protector" — these names share that spirit.

Liam — "Liam is the Irish short form of William, from Germanic words meaning 'will' and 'helmet', so 'resolute protector'." (Irish)
William — "William comes from the Germanic Willahelm, from wil 'will, desire' and helm 'helmet, protection', so 'resolute protector'." (German)

More names by meaning: Boy Names That Mean Protector & Guardian