Nielsen Hayden genealogy
Descendants of Robert de Ros
- Bef 1274Father: Robert de Ros (of Wark, Northumberland, England - Bef Nov 1269)
Robert de Ros (of Wark, Northumberland, England - Bef 20 Apr 1274)
Margaret de Brus ( - Bef 30 Jan 1307)
   └─ Robert de Ros (Abt 1272 Wark, Northumberland, England - Aft 1295)
    Lora (m. Bef 1292)
       └─ Margaret de Ros (Abt 1292 Scotland - Aft 26 Dec 1321)
        John Salvain (Abt 1280 Yorkshire, England - Between 1312 and 1320)(m. Bef 1307)
           └─ Gerard Salvain (Bef 5 Oct 1307 of North Duffield, Yorkshire, England - 1 Aug 1369) =>
            + [Unknown] Gray (Bef 13 Mar 1309 - Bef 1362)(m. 1325)