Jan-Michael Vincent was born in Denver, Colorado, where his father was stationed after enlisting in the US Army in 1941. His father, Lloyd Whiteley Vincent (September 7, 1919–August 30, 2000), was born in Tulare, California and raised in nearby Hanford, California in the San Joaquin Valley. His mother, Doris Jane (née Pace; August 2, 1925–February 22, 1993), was born in Arkansas and moved to Hanford as a toddler. Jan's grandfather, Herbert Vincent (September 26, 1876–January 14, 1974), was a bank robber and counterfeiter who had masterminded robberies in the 1920s and 1930s. Jan's uncle, Lloyd's brother Hoy, was shot to death in Tulare by a sheriff's deputy and was wanted for a robbery that occurred in Oregon. Two of Vincent's other uncles, Clifford and Harold, were convicted of bank robbery in Hardwick and Strathmore in 1931. In 1932, Herbert and his son, Gordon, were arrested in Hanford in January for bank robbery and assault with a deadly weapon, which left Lloyd alone at age twelve.