Nielsen Hayden genealogy
Family: Richard of Cornwall, King of the Romans / Sancie (F878)
m. 23 Nov 1243John, King of England (1166-1216) 
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Isabel of Angoulême, Queen Consort of England (1188-1246)
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Henry III, King of England (1207-1272)  |
| Joan of England (1210-1238) |
| Isabella of England (1214-1241) |
| Raymond Berenger (1195-1245)
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| Beatrice of Savoy ( -1266)
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| Margaret of Provence, Queen Consort of France (1221-1295) |
| Beatrice de Provence (1234-1267) |
| Richard of Cornwall, King of the Romans (1209-1272)
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| Sancie ( -1261)
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