Family: Henry DE PERCY, 3rd Baron Percy of Alnwick / Mary, of Lancaster (F3842)
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Male
Henry DE PERCY, 3rd Baron Percy of Alnwick
Birth Abt 1321 Death Abt 18 May 1368 Alnwick, Northumberland, England 
Burial 1368 Alnwick Abbey, Alnwick, Northumberland, England Marriage Other Spouse Joan DE ORREBY | F5433 Marriage Abt 1365 Father Sir Henry PERCY, 9th Baron Percy of Topcliffe, 2nd Baron Percy of A | F3965 Group Sheet Mother Idonia DE CLIFFORD | F3965 Group Sheet
Female
Mary, of Lancaster
Birth Abt 1320 Death 1362 Burial Father Henry PLANTAGENET, 3rd Earl of Lancaster | F3827 Group Sheet Mother Maud DE CHAWORTH | F3827 Group Sheet
Male
+ Henry PERCY, 1st Earl of Northumberland, 4th Baron Percy, King
Birth 10 Nov 1341 Alnwick, Northumberland, England Death 20 Feb 1408 Braham Moor, Yorkshire, England Burial Spouse Margaret NEVILLE | F5396 Marriage Spouse Maud DE LUCY, Baroness Lucy | F5432 Marriage 1381
Male
Sir Thomas DE PERCY, 1st Earl of Worcester, KG
Birth 1343 Death 23 Jul 1403 Shrewsbury, Shropshire, England Burial St. Peter's Church, Shrewsbury, Shropshire, England