House of the Swallow
From Tolkien Gateway
The House of the Swallow was one of the Twelve Houses of the Gondolindrim, mentioned in the Fall of Gondolin as being under Duilin. It was a house of archers, who wore a fan of feathers upon their helms, and they were arrayed in white and dark blue and in purple and black. Their emblem, which rested upon their shields, was that of an arrowhead. During the Fall they stood upon the walls of the citadel, and many were thrust to doom when the enemy came from behind after passing through the North Gate.
