Gregor was married twice: first to Catherine, daughter of William Masterman, of Restormel Castle; second, in 1795, to Jane, daughter of William Urquhart, of Craigston, Aberdeenshire.
William Gregor, the discoverer of titanium, was born on the Trewarthenick Estate as was his brother Francis Gregor, MP for the County of Cornwall from 1790 to 1806.
Francis Bacon | Francis I of France | Francis Ford Coppola | Pope Francis | Connie Francis | Francis I | Francis Poulenc | Francis of Assisi | Francis Drake | Richard Francis Burton | Francis II, Holy Roman Emperor | Francis | Francis Xavier | James Francis Edward Stuart | Francis Scott Key | St. Francis Xavier University | Francis Crick | Francis I, Holy Roman Emperor | Francis Galton | Francis Toye | Francis II | Francis Fukuyama | Francis Collins | Francis Rawdon-Hastings, 1st Marquess of Hastings | Arlene Francis | Taylor & Francis | St. Francis | Sir Francis Baring, 1st Baronet | Francis Veber | Francis Marion |