Grenefeld, John
| Title | Mr |
| Forenames | John |
| Surname | Grenefeld |
| Gender | m |
| Role | Mill owner |
| Address | Romsey |
| Region | Hampshire |
| Country | United Kingdom |
| Start date | 1444 |
| Original document | Windmills of Hampshire and the Isle of Wight |
| Compiler | Pru Barrett |
| Notes | Owned a corn mill here |