What origin is the name Guillelmo?

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

What are good sister names for Guillelmo?

Names from the same international tradition pair naturally with Guillelmo — for example Nautica, Arica, Laisha. You can browse more on our international names page.

Guillelmo

Discover the meaning and origin of the name Guillelmo

Guillelmo

Boy

International

3 syllables

Guillelmo is an International boy's name meaning "Resolute protector".

Guillelmo is a boy name of International origin meaning "Resolute protector". At 9 letters it is a longer name, which leaves room for a nickname. It has 3 syllables.

Origin: International
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 Guillelmo

What does Guillelmo mean?

Guillelmo is a boy name of International origin meaning "Resolute protector".

How popular is Guillelmo?

We have no birth-record ranking for Guillelmo: 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 Guillelmo

Nautica Arica Laisha Latrina Fredia Shaelyn

How to say Guillelmo

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Name numerology

8is the Chaldean number for Guillelmo.

Number 8 is linked with ambition, strength and determination.

More names with number 8

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

Combine Guillelmo with another name

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Names with a similar meaning to Guillelmo

Guillelmo 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