Greatjon Umber

Greatjon Umber, commonly called The Greatjon, is a character in Game of Thrones. He is played by Clive Mantle and will debut in the first season.

The Greatjon is the head of House Umber, a loyal vassal family to the Starks of Winterfell. He is a large, formidable warrior.

In the books
In the Song of Ice and Fire novels, Greatjon Umber is a huge bear of a man who makes for a fierce, loyal friend but a savage and dangerous enemy. He is the Lord of Last Hearth, the northern-most castle of the North bar only the lands held by the Night's Watch. The Greatjon has a son, Smalljon, and two uncles, Mors and Hother (nicknamed 'Crowfood' and 'Whoresbane' respectively).