 The American writer of non-fiction and fiction, Rodney William Whitaker (1931–2005), is best known for some novels that he wrote under the mononym pen name, Trevanian.The Armenian-Canadian portrait photographer Yousuf Karsh was commonly known as "Karsh of Ottawa".The comedian and illusionist Teller, the silent half of the duo Penn & Teller, legally changed his original polynym, Raymond Joseph Teller, to the mononym "Teller" and possesses a United States passport issued in that single name.