| Father | Male Henry De Percy |
| Born | 30 Jan 1300 | Leconfield, Yorkshire, England |
| Died | 18 Feb 1351 | Warkworth, Northumberland, England |
| Buried | 1351 | Phory Of Alnwick, Northumberland, England |
| Married | 1313 | , , Yorkshire, England |
| Father | Henry De Percy, Baron | F26314 Group Sheet | |
| Mother | Eleanor Fitzalan (Arundel) | F26314 Group Sheet | |
| Mother | Female Idonea De Clifford |
| Born | Abt 1299 | Of, Appleby, Westmoreland, England |
| Died | 16 Aug 1365 | |
| Buried | Beverley Minster, Beverley, Yorkshire, England |
|
| Father | Robert De Clifford | F26315 Group Sheet | |
| Mother | Maud De Clare | F26315 Group Sheet | |
| Child 1 | Female Margaret De Percy |
| Child 2 | Male Henry De Percy |
| Born | 1319 | Of, Castle, Alnwick, Northumberland, England |
| Died | 10 May 1368 | |
| Buried | , Alnwick, Northumberland, England |
|
| Spouse | Mary Plantagenet, [Baroness Percy] | F8956 | |
| Married | Bef Aug 1334 | Tutbury Castle, Tutbury, Staffordshire, England |
| Child 9 | Female + Maud De Percy |
| Born | Abt 1334 | Of, Warkworth Castle, Alnwick, Northumberland, England |
| Died | 10 Feb 1378 | |
| Buried | Cathedral, Durham, Durham, England |
|
| Spouse | John Neville | F26309 | |
| Married | Jun 1357 | Of, Alnwick, Northumberland, England |
| Child 10 | Female Eleanor Percy |
| Born | Abt 1335 | Of, Alnwick, Northumberland, England |
| Died | Bef 1367 | |
| Buried |