1320 in Tutbury Castle, Staffordshire, England, United Kingdom to Henry Plantagenet, 3rd Earl of Lancaster (1281-1345) and Matilda de Chaworth (1282-1322) and died 1 September 1362 in Alnwick, Northumberland, England, United Kingdom of unspecified causes. She married Henry de Percy, 3rd Baron Percy (1320-1368) 1334 JL in Tutbury Castle, Staffordshire, England, United Kingdom. Notable ancestors include Henry II of England (1133-1189), William I of England (1027-1087), Charlemagne (747-814), Hugh Capet (c940-996), Alfred the Great (849-899). Ancestors are from the United Kingdom, France, Germany, Russia, Ukraine, Belgium, the Netherlands, Italy, Spain, Turkey, the Byzantine Empire, Sweden, Canaan.Mary of Lancaster was born circa
",55.417" can not be assigned to a declared number type with value 55.413.
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|Offspring of Henry, 3rd Baron Percy of Alnwick and Mary of Lancaster (c1320-1362)|
|Henry Percy, 1st Earl of Northumberland (1341-1408)||10 November 1341 England, United Kingdom||20 February 1408 Bramham Moor, Yorkshire, England|| Margaret Neville (1329-1372)|
|Thomas Percy, 1st Earl of Worcester (1343-1403)||1343||23 July 1403 Shrewsbury, Shropshire, England, United Kingdom|
Namesakes of Mary of Lancaster (c1320-1362)
Common ancestors of Mary of Lancaster (c1320-1362) and Henry de Percy, 3rd Baron Percy (1320-1368)
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