William IV (1765-1837), King of the United Kingdom and Lord of Mann from 1830 to 1837.

His name appears in the Island's records in the form the promulgations took. An Act of Tynwald published at St John's in 1830 is dated in the first year of his Majesty's reign and closes with God save the King, attested by Cornelius Smelt as Lieutenant-Governor.

The Manx chronicle records his death as briefly: King William IV died on the 20th June 1837, in the seventh year of his reign. Victoria succeeded him the same day as Queen of Great Britain, Ireland and Man, and issued her proclamation for persons in office to proceed with the execution of their offices on the day after.