Nielsen Hayden genealogy
Richard de Avenal
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| Robert de Ros -Bef 1269 |
| Robert de Ros | |
| B: | of Wark, Northumberland, England |
| D: | Bef Nov 1269 |
| William I de Ros Aft 1192-1264 |
| William I de Ros | |
| B: | Aft 1192 |
| of Helmsley, Yorkshire, England | |
| D: | 1264 |
Lucy fitz Peter -Aft 1266 |
| Lucy fitz Peter | |
| B: | of Blaen Llyfni, Cathedine, Brecconshire, Wales |
| M: | Bef 24 Jan 1234 |
| D: | Aft 29 Sep 1266 |
| Robert de Ros 1172-Bef 1226 |
| Robert de Ros | |
| B: | Between 1170 and 1172 |
| Helmsley, Yorkshire, England | |
| M: | 1191 |
| Haddington, East Lothian, Scotland | |
| D: | Bef 23 Dec 1226 |
| William I "The Lion", King of Scotland 1143-1214 |
| William I "The Lion", King of Scotland | |
| B: | 1143 |
| D: | 4 Dec 1214 |
| Stirling, Stirlingshire, Scotland | |