William Willoughby, 11th Baron Willoughby de Eresby (1482-1526), father of Katherine Willoughby and the largest landowner in Lincolnshire, England
William Shakespeare | William Laud | William Blake | William | William III of England | William Morris | William McKinley | William Howard Taft | William Ewart Gladstone | William the Conqueror | William S. Burroughs | William Shatner | William Faulkner | William Randolph Hearst | William Wordsworth | William Tecumseh Sherman | Baron | William Hogarth | Prince William, Duke of Cambridge | William Penn | William Jennings Bryan | William Gibson | 11th United States Congress | William Wilberforce | William James | William Makepeace Thackeray | Fort William | William Hanna | William Hague | William III |
William Willoughby, 1st Baron Willoughby of Parham (c.1515 – 1570), English baron and nephew of the above