John and J.B. Burke. A genealogical and heraldic history of the extinct and dormant baronetcies of England, Scott, Webster, and Geary, 1838. pg 3. Google eBook
Whitehall, 23 April 1799. The King has been pleased to grant to His Most Dearly-Beloved Son Prince Edward, and to the Heirs Male of His Royal Highness's Body lawfully begotten, the Dignities of Duke of the Kingdom of Great Britain, and of Earl of the Kingdom of Ireland, by the Names, Styles, and Titles of Duke of Kent, and of Strathern, in the Kingdom of Great Britain, and of Earl of Dublin, in the Kingdom of Ireland. "No. 15126". The London Gazette. 23 April 1799. p. 372.