Nielsen Hayden genealogy
Descendants of Bethoc
Father: Donald III Bane, King of Scots (Bef 1040 Atholl, Perthshire, Scotland - 1099 Rescobie, Angus, Forfarshire, Scotland)
Bethoc
   └─ Hextilda of Tynedale
    Richard Comyn (of Northallerton & Badenoch, Invernessshire, Scotland - Between 1176 and 1182)
       └─ William Comyn ( - 1233)
        (Unknown first wife of William Comyn)
        :    + William of Ross ( - Abt 18 May 1274)
        Margaret of Buchan ( - Between 8 Apr 1242 and 31 Dec 1243)(m. Abt 1210)
           ├─ Alexander Comyn (of Buchan, Aberdeenshire, Scotland - Bef 6 Apr 1290) =>
           │ + Elizabeth de Quincy ( - Bef 4 May 1303)
            + William of Mar ( - Bef 25 Jul 1281)