John Jacob "Jack" Sugden is the son of Annie and Jacob Sugden and a long-standing resident of the village of Emmerdale (formerly Beckindale). From the early days, Jack seems to be a very rebellious and self-righteous character, who cares little for others' views. He also has numerous flings with different women and failed marriages, due to his infidelity. Jack is also an intelligent and articulate man but shown to be secretive from his family too. As time passed and Jack became a father, he has matured much more. He has firmly secured his roots in farming, which he originally tried so hard to escape from. Jack is still a man of principles and of pride, which can sometimes be his biggest weakness. His adoptive grandson is named after him.