| Authorised form of name | Guest; Sir; Josiah John (1785 - 1852) |
| Dates | 1785 - 1852 |
| Nationality | British |
| Place of birth | Dowlais, near Merthyr Tydfil, Glamorgan, Wales |
| Date of birth | 02 February 1785 |
| Place of death | Dowlais, near Merthyr Tydfil, Glamorgan |
| Date of death | 26 November 1852 |
| Activity | Honours:
Bt 1838
|
| Membership category | Fellow |
| Date of election | 10/06/1830 |
| Source | Sources:
Bulloch's Roll; DNB |
| Code | NA5944 |
Archives associated with this Fellow
| RefNo | Title | Date |
| EC/1830/33 | Guest, Sir Josiah John: certificate of election to the Royal Society | |