Morag Umber

Morag Umber is an unseen character in Game of Thrones. She is not expected to appear in the series, being long dead by the time it starts. Morag is one of the earliest recorded members of House Umber, and an ancient ancestor of the Greatjon.

Background
Morag married into House Umber of the Last Hearth, and bore her husband a son, Hothor Umber, who continued the family line with seven children of his own with Amarylis Manderly.

Season 1
She has an entry in The Lineage and Histories of the Great Houses of the Seven Kingdoms.

In the books
Morag Umber is referenced only in the TV adaptation of A Song of Ice and Fire and has no corresponding counterpart in the books.