Sir Joseph Williamson, PRS was an English civil servant, diplomat and politician who sat in the House of Commons of England variously between 1665 and 1701 and in the Irish House of Commons between 1692 and 1699. He was Secretary of State for the Northern Department from 1674 to 1679.

William Brouncker, 2nd Viscount Brouncker FRS was an Anglo-Irish peer and mathematician who served as the president of the Royal Society from 1662 to 1677. Best known for introducing Brouncker's formula, he also worked as a civil servant, serving as a commissioner in the Royal Navy. Brouncker was a friend and colleague of Samuel Pepys, and features prominently in the Pepys' diary.