Jon Umber (son of Jon) - A Wiki of Ice and Fire

Jon Umber, known as the Smalljon[2] and Smalljon Umber[3] in comparison to his father, is the eldest son of Lord Greatjon Umber and is the heir to the Last Hearth.[4] In the television adaptation Game of Thrones, he is portrayed by Dean S. Jagger.

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Jon Umber “The Greatjon”