
1) Arthurian character 2) Arthurian knight 3) Character 4) Christmas character 5) English boy name 6) Fictional character 7) Fictional prince 8) Fictitious character 9) Green Knight battler 10) Knight of the round table 11) Medieval legend 12) Nephew of Arthur 13) Opera set in England 14) Scottish boy name 
Found on 
https://www.crosswordclues.com/clue/gawain

1) Sir 
Found on 
https://www.crosswordclues.com/clue/gawain

 Gawain (n, ˈɡawain; also called Gwalchmei, Gualguanus, Gauvain, Walwein, etc.) is King Arthur`s nephew and a Knight of the Round Table in the Arthurian legend. Under the name Gwalchmei, he appears very early in the legend`s development, being mentioned in some of the earliest Welsh Arthurian sources. He is one of a select number of Round Table.....
Found on 
http://en.wikipedia.org/wiki/Gawain
 [opera]
[opera]  Gawain is an opera with music by Harrison Birtwistle to a libretto by David Harsent. The story is based on the Middle English romance Sir Gawain and the Green Knight. The opera was a commission from the Royal Opera House, London, where it was first performed on 30 May 1991. Rhian Samuel has published a detailed analysis of the opera...
Found on 
http://en.wikipedia.org/wiki/Gawain_(opera)

hero of Arthurian legend and romance. A nephew and loyal supporter of King Arthur, Gawain appeared in the earliest Arthurian literature as a model of ... [1 related articles]
Found on 
http://www.britannica.com/eb/a-z/g/14

In Arthurian legend, one of the knights of the Round Table who participated in the quest for the 
Holy Grail. He is the hero of the 14th-century epic poem Sir Gawayne and the Greene Knight. Gawain...
Found on 
http://www.encyclo.co.uk/local/20688

In Celtic mythology, Gawain was the son of King Lot of Orkney or the sun-god Lug.
Found on 
http://www.probertencyclopaedia.com/browse/D3.HTM

[
n] - (Arthurian legend) a nephew of Arthur and one of the knights of the Round Table
Found on 
http://www.webdictionary.co.uk/definition.php?query=Gawain

In Arthurian legend, one of the knights of the Round Table who participated in the quest for the Holy Grail. He is the hero of the 14th-century epic poem 
Sir Gawayne and the Greene KnightFound on 
https://www.encyclo.co.uk/local/21221
  No exact match found.