George Maitland

George Maitland was the father of Artie Maitland and Angie Maitland, the children for whom Clara Oswald nannied. (TV: The Bells of Saint John)

Behind the scenes
Although "Maitland" is never expressly given as George's surname, "Maitland_Family" is the name of the household Wi-Fi network and the Eleventh Doctor mentions that "Mr Maitland went next door, so I said I'd look after the kids" in The Name of the Doctor.