Family: Sir Ralph Daubeny / Katherine Thweng (F39751)
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 | Isabel De Ros ( -1309)
|
 | Marmaduke De Thweng ( -1297) |
| William (2nd Lord Thweng) De Thweng ( -1340) |
| Robert 3rd Lord Thweng ( -1344) |
| Thomas 4th Lord Thweng ( -1374) |
| Elizabeth Daubeny ( -1433)  |