Belle-Etoile's list "Arthurian Myth Names" of 3 great name ideas: Gawain - Geraint!

Arthurian Myth Names

With a noble air and a distinctive yet familiar sound, Gawain is drawn from Arthurian legend, in which he is one of King Arthur's loyal knights and his nephew. Also appearing as the hero of the 14th century poem, Sir Gawain and The Green Knight, his name is possibly borrowed from the Welsh Gwalchmai, meaning "May hawk".
 
While similar names such as Wayne, Owen, and Gwen are familiar choices, Gawain has long been superseded by its Scottish form, Gavin. In fact, since records began in the 1880s, only 85 boys have ever been called Gawain in the US.

Gawain

Derived from the name Caradog, the handsome ancient Celtic name was worn by one of the Knights of the Round Table, as well as a semi-legendary Welsh King. Possibly a cognate of Cedric and Carys, Caradoc is ultimately derived from the Brythonic name Caratācos meaning "loved", itself originating from the Celtic karu.
 
Familiar in various forms in the Middle Ages, Caradoc is rarely used today.

Caradoc

The connection to a knight of the Round Table in Arthurian legend gives this name a hint of nobility.  Geraint Thomas was a Welsh cyclist who competed in the 2008 Olympics.