As Cousin Mary Owl talks to Lady Aberlin about cousins, a lot is learned about King Friday's family. He has an older sister named Claire who is the mother of Lady Aberlin. He also has a younger brother named Paul who is the father of Nicky, Quentin, Polly, and Kevin. Including Prince Tuesday, Lady Aberlin has five cousins.
Keith David mentions that Carrie Dell was named for members of Betty Okonak Templeton's family, James Michael Jones' family, and his own family.