The Georgian era is a period in British history from 1714 to c. 1830–37, named eponymously after the Hanoverian kings George I, George II, George III and George IV.  The sub-period that is the Regency era is defined by the regency of George IV as Prince of Wales during the illness of his father George III. The definition of the Georgian era is often extended to include the relatively short reign of William IV, which ended with his death in 1837.