Name
- Gontaut, Charles, Duke of Biron, soldier, 1562-16021
- Gonzaga, Charles, Duke of Nevers, Duke of Mantua (1627)1
- Gonzaga, Family, 1328-17081
- Grant, John, Gunpowder Plot Conspirator1
- Greenway, Oswald, alias Jesmond1
- Gregory XV, Pope, 1554-16231
- Grenville, Richard Plantagenet, 2nd Duke of Buckingham and Chandos, politician and bankrupt aristocrat, 1797-18611
- Grenville, Richard, 1st Duke of Buckingham and Chandos, né Temple-Nugent-Grenville; politician, 1776-18391
- Grimaldo Gutierrez, Joseph, Marques de Grimaldo, Secretary and Councillor of State1
- Haldane, James, envoy to Hesse, fl 17181
- Hanseatic League1
- Harington, John, 1st Baron Harington of Exton, 1539-16131
- Harlay, Christophe de, Comte de Beaumont, French Ambassador in England, c 1570-16151
- Heems, Arnold E-, Baron, Imperial Envoy to the Netherlands1
- Henley, John, Orator1
- Henry, Princes of Wales, of Stowe MS 1401
- Hoby, Edward, MP for Rochester1
- Hoens, Henry, Merchant, of Antwerp1
- Holles, Thomas Pelham-, Duke of Newcastle, prime minister, 1693-17681
- Holzendorf, Charles, Secretary to the English Embassy at Madrid1