Jacob Gryffen

From Tardis Wiki, the free Doctor Who reference

Jacob Gryffen was the son of Alistair Gryffen and Eleanor Gryffen and the brother of Mina Gryffen.

Jacob went missing, along with his mother and sister, in a freak accident in 2040. He haunted his father's every step afterwards. (TV: The Fall of the House of Gryffen)