Family: William Douglas, Earl of Douglas / Margaret of Mar (F1404)
m. Bef 1360-
Father | Male
William Douglas, Earl of Douglas
Born Abt 1325 Douglas, Lanarkshire, Scotland 
Died 1384 Buried Married Bef 1360 Other Spouse Margaret Stewart | F1405 Married Father Sir Archibald Douglas | F1415 Group Sheet Mother Beatrix de Lindsay | F1415 Group Sheet
Mother | Female
Margaret of Mar
Born Abt 1330 Scotland Died Bef 19 Oct 1393 Buried Father Donald of Mar | F2597 Group Sheet Mother Isobel Stewart | F2597 Group Sheet
Child 1 | Female
Isabel Douglas
Born Abt 1355 Scotland Died UNKNOWN Buried Spouse Sir Malcolm Drummond, of that Ilk | F1397 Married Spouse Alexander Stewart, Earl of Mar | F4041 Married
Child 2 | Male
James Douglas, 2nd Earl of Douglas
Born Abt 1358 Scotland Died Aug 1388 Otterburn, Scotland Buried Spouse Isabella Stewart, Countess of Douglas | F1410 Married