KLDeWitt Genealogy Research Project
Our Family's Journey Through Time from Europe and Canada to the US

![]() | Mary Percy, Baroness Ros of Helmsley |
| Mary Percy, Baroness Ros of Helmsley | |
| B: | 12 Mar 1367 |
| D: | 25 Aug 1394 |
![]() | John Ros, 5th Baron Ros of Helmsley KB |
| John Ros, 5th Baron Ros of Helmsley KB | |
| B: | UNKNOWN |
| D: | 6 Aug 1393 |
| Paphos, Cyprus | |
|
![]() | Henry Percy, 3rd Baron Percy of Alnwick Warden of the Marches High Sheriff of Northumberland |
| Henry Percy, 3rd Baron Percy of Alnwick Warden of the Marches High Sheriff of Northumberland | |
| B: | Abt 1321 |
| D: | 1368 |
| Alnwick Castle, Northumberland, England | |
| Henry Percy, 1st Earl of Northumberland 4th Baron Percy King of Mann KG Lord Marshal | |
| B: | 10 Nov 1341 |
| D: | 20 Feb 1408 |
| Margaret Neville, Baroness Ros of Helmsley Countess of Northumberland | |
| B: | 12 Feb 1329 |
| D: | 12 May 1372 |
![]() | Mary Plantagenet of Lancaster, Baroness Percy |
| Mary Plantagenet of Lancaster, Baroness Percy | |
| B: | Abt 1320 |
| D: | 1 Sep 1362 |
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