Nielsen Hayden genealogy
Descendants of William of Mar
- Bef 1281Father: Duncan of Mar ( - Between 1242 and 7 Feb 1244)
William of Mar ( - Bef 25 Jul 1281)
Elizabeth Comyn ( - 1267)
   └─ Donald of Mar ( - Aft 25 Jul 1297)
    Ellen ( - Aft Feb 1294)
       ├─ Isabel of Mar ( - Bef 1302)
       │ Robert de Brus, King of Scotland (11 Jul 1274 Scotland - 7 Jun 1329 Cardross, Dumbartonshire, Scotland)
       │ (m. Abt 1295)
       │ (m. Abt 1295)
       │    └─ Marjory Bruce ( - Oct 1317 bur.Paisley, Renfrewshire, Scotland) =>
       │     + Walter Stewart (Abt 1297 - 9 Apr 1327 Bathgate, West Lothian, Scotland)(m. Aft 25 Apr 1315)
       └─ Gratney of Mar (Abt 1270 - Bef Sep 1305)
       
           │ + John Menteith (of Arran, Ayrshire, Scotland - Abt 1344)
           └─ Donald, Regent of Scotland (Abt 1293 - 12 Aug 1332 Dupplin, Perth, Scotland) =>
            + Isabel Stewart ( - Between 15 Jun 1347 and 15 Jan 1348)