Mark Vonnegut

Mark Vonnegut (born May 11, 1947) is an American pediatrician and author. He is the son of writer Kurt Vonnegut. He is the brother of Edith Vonnegut and Nanette Vonnegut. He described himself in the preface to his 1975 book as "a hippie, son of a counterculture hero, BA in religion, (with a) genetic disposition to schizophrenia." Provided by Wikipedia