Family: Henry Percy, 3rd. Baron Percy / Mary Plantagenet (F4346)
Maud Chaworth ( -1321) |
Henry Plantagenet, 1st. Duke of Lancaster (1310-1361)  |
Mary Plantagenet (1321-1362) 
|
| Henry Percy, 3rd. Baron Percy (1321-1368) |
| Henry Percy, 1st. Earl of Northumberland (1341-1408) |