#AtoZchallenge—U is for —Unsullied

From the Shadow Lands of Asshai to the Shores of Dragonstone and the frozen lands beyond the Wall in Game of Thrones (#GoT) comes the 10th anniversary of the AtoZ challenge...

The Unsullied are eunuch soldiers who Daenary's frees from the Slavers of Astapor. They are rigorously trained in combat and most of them undergo castration at an early age. Grey Worm becomes infatuated with Missandei the translator. Daenerys ends up buying a whole army of Unsullied who she frees after Drogon kills the master/slaver with Dragonfire.

Can you guess who the letter U is?

Lord _, called "the Greatjon", is the Lord of Last Hearth and a Bannerman of the North. He joins Robb Stark in the war and is the first one to call him The King in the North.  Rickon heads to the seat of House _ to seek refuge.