Three Royal Knights of the Island of Britain
A trio of Arthur’s knights – Nascien, the son of the King of Denmark, Mordred, and Llew – in Welsh legend, who were handsome, wise, and skilled in arms.
The inclusion of Mordred in this list is interesting, and this description of him is unique to Welsh legend. Hoel is also said to be one of the three Royal Knights, calling him wise, skilled at arms, and handsome.
Source
Triads of the Island of Britain (Welsh ”Triads”) | 11th century to 14th century