See also
| Husband: | William DOUGLAS ( - ) | |
| Wife: | Margaret of MAR ( - ) | |
| Children: | James DOUGLAS (1358-1388) | |
| Isabella DOUGLAS (1360-1408) | ||
| Marriage | 1357 | |
| Name: | William DOUGLAS | |
| Sex: | Male | |
| Father: | Archibald DOUGLAS (c. 1297-1333) | |
| Mother: | Dornagilda COMYN (c. 1295- ) | |
| Occupation | 1st Earl of Douglas | |
| Name: | Margaret of MAR | |
| Sex: | Female | |
| Father: | Donald II MACGYLOCHER (c. 1302-1332) | |
| Mother: | Isabella STEWART (c. 1300- ) | |
| Occupation | Countess of Mar | |
| Name: | James DOUGLAS | |
| Sex: | Male | |
| Spouse: | ? ( - ) | |
| Birth | 1358 | |
| Occupation | 2nd Earl of Douglas, Scottish warlord | |
| Death | 14 Aug 1388 (age 29-30) | |
| Name: | Isabella DOUGLAS | |
| Sex: | Female | |
| Spouse: | Malcolm DRUMMOND ( -c. 1403) | |
| Birth | 1360 | |
| Occupation | Countess of Mar | |
| Death | 1408 (age 47-48) | |
Margaret became Countess of Mar on the death of her brother who had no children.