Don't know how we will prove a connection between Peter the carpenter and Jonas.
This is the 3rd or 4th time I've looked at GANDONs and some time ago some info was found re indentures and gunsmiths.
1841
HO107 Piece 491 Book/Folio 2/11 Page 17
High Street, Chatham, Rochester
GANDON, Peter M 65 1776 Kent
GANDON, Ann F 60 1781 Kent
GANDON, Isaiah M 20 1821 Kent
GANDON, Hannah F 25 1816 Kent
1851
HO107 Piece 1611 Folio 309 Page 37
Address: Mount Pleasant, East Place, Chatham
GANDON, Peter Head Married M 79 1772 Retired Carpenter Faversham Kent
GANDON, Ann Wife Married F 74 1777 Halling Kent
IR 1/32
Monday 13 June 1785 - No 20 - Jonas Gandon - Citizen and Cooper of London - Fredk. Dearberg
I have a copy of Frederick's Indenture.
Also
IR 1/27
Saturday 4 September 1773 - No 1 - William Harris - Citizen and Stainterstainer ? of London - Peter Gandon