Father: Earl William I of Douglass Born: 1331 Married: Unknown Died: May 1384
Mother: Lady Margaret of Mar Born: 1338 Died: 1391
Children: 1. Lady Isabel of Douglas (b.1355) 2. Earl James II of Douglas (b.1358)
Father: Earl William I of Douglas Married: Unknown Mother: Lady Margaret Stewart of Angus Born: 1357 Died: March 23, 1418
Children: 1. Earl George Douglas I of Angus (b.1378)