Name
- Frederick William I, of Prussia1
- Fuller, John Trayton, of Add MS 331001
- Gastaldi, Giovanni Battista, of Genoa, diplomat, fl 1734-17541
- Gautier, D-1
- Gearing, Joshua, correspondent of Thomas Pelham, fl 17251
- General Post Office, 1660-19691
- George Clifford and Sons1
- George III, King of Great Britain and Ireland, 1738-18201
- Gibert, Carlos, correspondent of Thomas Pelham Holles, 1st Duke of Newcastle, fl 1744-17451
- Ginori, Carlo Lorenzo, Marquis, politician, farmer and industrialist, 1702-17571
- Goodricke, John, 5th Baronet, of Ribston, diplomat and politician, 1708-17891
- Gordon, Jane, petitioner to King George II, fl 17311
- Gore, John, correspondent of Thomas Pelham Holles, 1st Duke of Newcastle, fl 17431
- Goulburn, M, correspondent of Thomas Pelham, 2nd Earl of Chichester, fl 17771
- Gould, Theodore Vincent, tutor and clergyman, fl 1753-18151
- Graham, John, of Add MS 328041
- Grassi, Gabriello, correspondent of Thomas Pelham, 1st Earl of Chichester, fl 17511
- Grattan, Henry, MP for Charlemont1
- Gravier, Charles, Comte de Vergennes, politician, diplomat and statesman, 1719-17871
- Gronsfeld, Bertram Philip Sigismond Albrecht, Count of Diepenbroeck, diplomat, 1715-17721