Tommard Karstark

Commard Karstark is an unseen character in Game of Thrones. He is not expected to appear in the series, being long dead by the time it starts. He is one of the earliest recorded members of House Karstark, and an ancient ancestor of Lord Eddard Karstark.

Background
Commard Karstark was the first born son of Lord Beric Karstark and Lady Mara Karstark. He married Regan Umber at Karhold and she bore him five sons.

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

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