Family: William Douglas, 1st Earl of Douglas / Margaret De Mar, Countess of Mar (F22233)
m. Abt 1344
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Male
William Douglas, 1st Earl of Douglas
Birth Abt 1323 Lanarkshire, Scotland 
Christening 1 Jan 1348 Aryshire, Scotland Death Abt 1 May 1384 Lanarkshire, Scotland Burial Aft 1 May 1384 Roxburghshire, Scotland Marriage Abt 1344 Somerset, England Father Archibald Douglas | F685 Group Sheet Mother Beatrice De Lindsay, Lady | F685 Group Sheet
Female
Margaret De Mar, Countess of Mar
Birth 1328 Linlithgowshire, Scotland Death 19 Oct 1393 Scotland Burial 19 Oct 1393 England, United Kingdom Father Donald De Mar, Eighth Earl of Mar | F23029 Group Sheet Mother Isabella Stewart | F23029 Group Sheet
Male
+ James Douglas, 2nd Earl of Douglas
Birth Abt 1340 Lanarkshire, Scotland Death 19 Aug 1388 Nothumberland, England Burial 26 Aug 1388 Roxburghshire, Scotland Spouse Isabel Eupheme Stewart, Princess | F681 Marriage 23 Sep 1371 Aryshire, Scotland
Female
+ Joan Douglas
Birth 1360 Lanarkshire, Scotland Death 1395 Cumberland, England Burial 1395 Cumberland, England Spouse William Dacre | F8066 Marriage Bef 1379 England, United Kingdom