Evelyn Ernest Percy Tisdall (1907–1977) was a British journalist and schoolmaster and writer. He is best known as a writer of biographies.
Tisdall was educated at Sherborne and Sandhurst and then became a Fleet Street journalist. before turning to biography, mostly of British and European royalty. He served in the army during the Second World War, after which he became headmaster of Dennington House School, near Barnstaple. His royal books sold well on publication, but are now regarded as 'slightly sensational' and 'slightly hostile'.[1]