Nielsen Hayden genealogy
Family: Marmaduke de Thweng / Isabel de Ros (F2441)
m. 1273
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Marmaduke de Thweng ( -1282)
|
Lucy de Brus ( -1282)
|
Robert de Thweng ( -1284)  |
| William de Ros ( -1310)
|
| Eustache fitz Ralph ( -1301)
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| Marmaduke de Thweng ( -1323)
|
| Isabel de Ros ( -1309)
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| Katherine de Thweng ( -1364) |
| Lucy de Thweng (1290-1324) |