Lewis Capaldi
From Tardis Wiki, the free Doctor Who reference
Lewis Capaldi was used in a guessing game by the Thirteenth Doctor, Graham O'Brien, Yasmin Khan and Ryan Sinclair. His name was fixed to the Doctor's forehead. (PROSE: The Shadow Passes)
Behind the scenes
Lewis Capaldi is the second-cousin-once-removed of Twelfth Doctor actor Peter Capaldi. Peter Capaldi also exists in-universe.
