| Name | John Grey | |
| Suffix | 1st Earl of Tankerville, jure uxoris 6th Lord of Powys, KG | |
| Birth | Aft. 1384 | |
| Gender | Male | |
| Death | 22 Mar 1421 | |
| Person ID | I322555243373 | Hurst Improbable Family Tree |
| Last Modified | 15 Jun 2026 | |
| Father | Thomas Grey, Sir, b. 1359 d. Abt. 3 Dec 1400 (Age 41 years) | |
| Mother | Joan de Mowbray, b. Abt. 1363 d. 30 Nov 1402 (Age 39 years) | |
| Family ID | F6807 | Group Sheet | Family Chart |