What origin is the name Guilelmus?

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

What are good sister names for Guilelmus?

Names from the same latin tradition pair naturally with Guilelmus — for example Olivia, Emily, Ava. You can browse more on our latin names page.

Guilelmus

Discover the meaning and origin of the name Guilelmus

Guilelmus

Boy

Latin

3 syllables

Guilelmus is a Latin boy's name meaning "Resolute protector".

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

Origin: Latin
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 Guilelmus

What does Guilelmus mean?

Guilelmus is a boy name of Latin origin meaning "Resolute protector".

How popular is Guilelmus?

We have no birth-record ranking for Guilelmus: 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 Guilelmus

Olivia Emily Ava Grace Victoria Camila

How to say Guilelmus

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Name numerology

7is the Chaldean number for Guilelmus.

Number 7 is linked with wisdom, reflection and intuition.

More names with number 7

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

Combine Guilelmus with another name

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

Names with a similar meaning to Guilelmus

Guilelmus 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