Richard’s Genealogy
Family: William de Burgh, Earl of Ulster / Matilda of Lancaster (F1253)
m. Aft 1 May 1327Henry, Earl of Lancaster (1281-1345) 
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Maud Chaworth (1285-1322)
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| Henry, Duke of Lancaster (1300-1361) |
Blanche of Lancaster (1305-1380)  |
| Joan of Lancaster (1312-1345) |
| Isabella of Lancaster (1317-1347) |
| Eleanor of Lancaster (1318-1372) |
| Mary of Lancaster (1320-1362) |
| William de Burgh, Earl of Ulster (1312-1333) |
| Matilda of Lancaster (1310-1377)
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