Tully (son of Edmure)

The unnamed son of Edmure and Roslin Tully is a an unseen character in Game of Thrones. He was the son of Lord Edmure Tully and Lady Roslin Frey.

Season 6
During the Second Siege of Riverrun, Jaime Lannister threatened Edmure Tully to surrender Riverrun or he would kill his son and wife. Edmure copulated to his threat

After the siege, Jaime and Walder Frey were having a feast celebrating the fall of Riverrun. Frey mentions to Jaime he didn't kill his grandson.