Family: William St Clair Of Hermaston / Lady de Mar Margaret Gartney De St Clair (F746)
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 | Baron of Roslin Henry Sinclair, II (1260-1335)
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 | Alice Fenton (1270-1336)
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| 8th Lord of Roslin William Sinclair (1283-1358)  |
| William St Clair Of Hermaston (1297-1330)
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| John Saint Clair (1323-1377) |