"A biography or biographical article; especially a short profile of a public figure. Now rare", Early 19th cent.; earliest use found in Precept & Example. From bio- + -graph, after biographic, biography. Compare French biographe, German Biograph, both in sense ‘biographer’.[biograph etymology, biograph origin, 英语词源]
"To write a biography or biographical profile of (a person, especially a historical or public figure); (also) to record (historical information) in a biographical account. Occasionally without object", Late 18th cent. Back-formation from either biographer or biography.