James Douglas Morrison was born on December 8, 1943, in Melbourne, Florida, the son of Clara Virginia (née Clarke) and future Rear Admiral George Stephen Morrison.

Morrison had a sister, Anne Robin, who was born in 1947 in Albuquerque, New Mexico; and a brother, Andrew Lee Morrison, who was born in 1948 in Los Altos, California. His ancestry included English, Scottish, and Irish.

Jim Morrison's Family Tree