Family: Sir William Borthwick / Rachel Hay (F1821)
Captain of Edinburgh Castle William Borthwick (1355-1439) 
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Moriota Hay (1355- )
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| Lord High Constable of Scotland Thomas Hay (1352-1406) |
| Elizabeth Stewart (1351- )
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| Sir William Borthwick (1370-1458)
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Janet Borthwick (1388-1464)  |
