According to Wikipedia,
Edan Donald Everly is an American musician and singer-songwriter. Early life Everly is the son of Don Everly and nephew to Phil Everly of the Everly Brothers. His mother is actress Venetia Stevenson. His siblings are sisters Stacy Everly and Erin Everly; he has a half sister, Venetia Everly. His maternal grandparents were the director Robert Stevenson and actress Anna Lee. His paternal grandparents were Ike and Margaret Everly.