John George Harris Ronketti
- occupation:
- Barometer maker,
- Hydrometer maker,
- Optician,
- Thermometer maker
- Nationality:
- British
1845 - 102 St Martin's Lane, London
1845 - 116 Great Russell St., Bloomsbury, London
1845 - 30 Theobolds Rd, Holborn, London
1846 - 19 Leather Lane, Holborn, London
1845 - 15 Museum St., Bloomsbury, London