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Gender: Male Meaning of Gwilym: "resolute protection" Origin of Gwilym: Welsh variation of William

The name Gwilym is a boy's name of Welsh origin meaning "resolute protection". Gwilym and is often added to lists like Cool Boy Names From Around the World and discussed in our forums with posts like "Picky Parents BNG".

From the experts:

An unusual version of William, helped or hindered by a slight baby-talk feel.

Find other names based on Gwilym using our baby name generator.

Famous People Named Gwilym

Gwilym Lloyd George, 1st Viscount Tenby, former British home secretary
Gwilym Williams, former Archbishop of Wales
Gwilym Simcock, Welsh pianist and composer
Gwilym Emyr "Gwil" Owen III, American singer-songwriter
Gwilym Bowen Rhys, Welsh singer and guitarist, member of the band Plu and former member of the band Y Bandana, clogmaker
Gwilym Prys Prys-Davies, Baron Prys-Davies, Welsh MP
Gwilym Lee, British actor
Gwilym Hugh Lewis, British WWI flying ace
Gwilym Ivor Thomas, British army officer
Gwilym Ellis Lane Owen, British philosopher
Gwilym Pugh, English musician and model
Gwilym ap Tudur, Welsh nobleman

Pop Culture References for the name Gwilym

Gwilym Owain "William" Herondale, character in the Infernal Devices trilogy


FantasyandPrayer Says:


Love it!!! Particularly the Gwillym spelling (2 L's) - a guilty pleasure name for sure!!

RoddyThlayli Says:


Love this name, and the short form Gwili (GWEE-lee).

Afton Olivia Says:


same thats why i ended up searching this up too wow

Afton Olivia Says:


oh jesus christ thats how i got here too

Jos7277 Says:


I love this name because of Will Herondale, and it definitely grows on you. I love this name so, SO much.

franklyjennifer Says:


Gwilym is the birth name of the character William "Will" Herondale from The Infernal Devices series by Cassandra Clare