Thorkell succeeded Leif some time after 1018 AD[?]. Leif, himself, had previously succeeded his father, Eric the Red, or Eirikr Thorvaldsson[?].
... under the age of 18 living with them, 55.9% are married couples living together, 8.2% have a female householder with no husband present, and 32.5% are non-families ...