Calum Maclean
Maclean was born in Òsgaig, Isle of Raasay, Scotland, into a family of five boys and two girls. His father was Malcolm MacLean (1880–1951), who was a tailor. His mother, Kirsty (1886–1974), was the daughter of Sorley Mor Nicolson of Braes, Skye, and his wife, Ishabel.
Andrew Dyas MacLean
Andrew MacLean was born in Toronto, the only child of Hugh Cameron MacLean and Elizabeth ('Bessie') Emma Matilda (née Dyas) MacLean. His mother died when he was six months old and he was raised by his maternal grandmother, Emma Ball Dyas. His grandfather, Thomas W. Dyas, was the advertising and circulations manager of "The Toronto Mail" and of the "Toronto Empire", and a founder of A. McKim and Company, the first advertising agency in Canada. MacLean was educated at Appleby College, Upper Canada College, and University of Toronto Schools.