Lowell

"Lowell there... likes'em a bit broken in."

- Polliver to Sandor Clegane

Lowell is an minor character in the fourth season. He is played by guest star Stuart Martin and appears in "Two Swords."

Biography
Lowell is a man-at-arms fighting for House Lannister in the War of the Five Kings under the command of Ser Gregor Clegane, the Mountain.

In the books
In the A Song of Ice and Fire novels there's no mention of one of the Mountain's Men being called Lowell.