Gwilym Name Meaning & Origin
Gwilym
Origin of the name William:
From the Old Norman French Willaume, which is derived from the Old High German Willehelm, a compound name composed from the elements willeo (will, determination) and helm (protection, helmet): hence, "resolute protector." William is the most popular name introduced to England by the Normans. It was borne by William the Conqueror (1027? - 87), who invaded England and defeated Harald at the Battle of Hastings, and by three other kings of England.
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US Popularity of Gwilym Over Time

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Gwillym (with two 'l's) is an alternate spelling.
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Gwil, Gwily, Gwilly
- Meanings and history of the name Gwilym
Welsh form of William.
Pronounced: GWI-lim- Famous real-life people named Gwilym
Dafydd ap Gwilym, 14th century poet Welsh poet; regarded as the best Welsh poet of all time.
Gwilym Lee, an actor who appeared as Brian May in the movie "Bohemian Rhapsody".- Gwilym in song, story & screen