Jeffrey became known all over the world when he was given a 957-year prison sentence for killing 17 young men in brutal ways between 1978 and 1991.
David Dahmer was Lionel and Joyce Dahmer's second child.
When he was born on December 18, 1966, in Doylestown, Ohio, his parents let his older brother, Jeffrey, choose his name.
Jeffrey was six years old when his younger brother came along. He was born on May 21, 1960.
It is thought that he thought David took some of the love his parents had for him.
David, who was only 12 years old at the time, moved to Wisconsin with his mother. His father worked a lot and was rarely at home.
In 2004, Lionel was asked by Larry King about the relationship between Jeffrey and David.