Clinton Eastwood, Jr. was born in San Francisco. He is the son of Clinton Eastwood Sr., a steelworker and migrant worker. His mother was Margaret Ruth (Runner) Eastwood, an IBM factory worker. He was nicknamed “Samson” by the hospital nurses because he weighed 11 pounds 6 ounces (5.2 kg) at birth. He has a younger sister, Jeanne, born in 1934. His stepfather was lumber magnate John Belden Wood. Eastwood is of English, Irish, Scottish, and Dutch ancestry.