Julius Lethbridge-Stewart

From Tardis Wiki, the free Doctor Who reference

Julius Lethbridge-Stewart was the son of Olivia and Henry Lethbridge-Stewart, the Brigadier's nephew. He also had a younger sister. (PROSE: Faithful Friends: Part 2)

Julius and his family were from a parallel universe, one of the many realities witnessed by James Gore when he crossed universes from Inferno Earth to the main Earth. (PROSE: The Man from Yesterday)