Name
- Grenville, William Wyndham, 1st Baron Grenville, politician and Prime Minister, 1759-18341
- Greville, Fulke, of Wilbury, county Wiltshire; MP1
- Grieve, John, correspondent of Francis Godolphin Osborne, 5th Duke of Leeds, fl 17951
- Grimaldi, Pablo Jerónimo, Marqués de Grimaldi, Spanish diplomatist1
- Grove, Hannah, of Tipperary, correspondent of Robert Darcy, 4th Earl of Holdernesse, fl 17561
- Guasco, G B, clergyman and correspondent of Robert Darcy, 4th Earl of Holdernesse, fl 17501
- Hailes, Daniel, British diplomat, c 1752-18351
- Hake, L E, clerk to Richard Wolters, English agent in Rotterdam, fl 17611
- Hale, George, correspondent of Robert Darcy, 4th Earl of Holderness, and Frederick II of Prussia, fl 17581
- Hale, Samuel, correspondent of Francis Osborne, 5th Duke of Leeds, fl 17841
- Hales, Stephen, natural philosopher, 1677-17611
- Hamilton, Elizabeth, née Gunning; widow of James, 6th Duke of Hamilton1
- Hamilton, James, of Tollymore1
- Hammersleys and Co, bankers, London, fl 1822-18351
- Hammond, George, Under-secretary for Foreign Affairs1
- Hampden, Robert, 4th Baron Trevor; 1st Viscount Hampden 1776, formerly Trevor1
- Hansby, Ralph1
- Harcourt, Sarah Frances, widow of Henry Harcourt1
- Hardenberg, August Ulrich, Baron, Hanoverian Envoy to Hesse-Cassel1
- Hardenberg,, Friedrich Carl, Baron, Hanoverian Minister of State1