KLDeWitt Genealogy Research Project
Our Family's Journey Through Time from Europe and Canada to the US
1367 - 1394 (27 years)| Name | Mary Percy | |
| Suffix | Baroness Ros of Helmsley | |
| Birth | 12 Mar 1367 | |
| Gender | Female | |
| Reference Number | 20433 | |
| Death | 25 Aug 1394 | |
| Person ID | I20433 | KLD Genealogy |
| Last Modified | 26 Nov 2025 | |
| Father | Henry Percy, 3rd Baron Percy of Alnwick Warden of the Marches High Sheriff of Northumberland, b. Abt 1321 d. 1368, Alnwick Castle, Northumberland, England  (Age 47 years) | |
| Relationship | biological | |
| Mother | Joan Orreby, Baroness Percy | |
| Relationship | biological | |
| Family ID | F6568 | Group Sheet | Family Chart |
| Family | John Ros, 5th Baron Ros of Helmsley KB, b. UNKNOWN d. 6 Aug 1393, Paphos, Cyprus | |
| Family ID | F7250 | Group Sheet | Family Chart |
| Last Modified | 26 Nov 2025 | |
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