Nielsen Hayden genealogy
Family: Robert de Ferrers / Mary de Lusignan (F519)
m. Aft 26 Jul 1249William de Ferrers (1193-1254) 
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Margaret de Quincy (1222-1281)
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Joan de Ferrers ( -1310)  |
| William de Ferrers (1240-1287) |
| Hugh XI "le Brun" de Lusignan (1221-1250)
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| Yolande of Brittany (1218-1272)
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| Hugues XII de Lusignan ( -1270) |
| Alice de Lusignan (1236-1290) |
| Robert de Ferrers (1239-1279)
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| Mary de Lusignan ( -1268)
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