Family: 1st Earl of Douglas-Mar William Douglas / Countess of Mar Margaret of Mar (F753)
Sir Archibald of Douglas ( -1333) 
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| 9th Earl of Mar Domhnall II of Mar (1302-1332)
|
Isabella Stewart (1300-1347)
|
10th Earl of Mar Thomas of Mar (1330-1377)  |
 | 1st Earl of Douglas-Mar William Douglas (1327-1384)
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| Countess of Mar Margaret of Mar ( -1391)
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| Countess of Mar Isabel Douglas (1360-1408) |
 | 2nd Earl of Douglas James Douglas (1358-1388) |
