Viscount Castle Stewart in Tyrone is in Viscount Ireland.
In 1793 Andrew Thomas Stewart 1st Earl Castle Stewart [aged 67] was created 1st Viscount Castle Stewart in Tyrone. Sometimes written as Castlestewart.
The London Gazette 13609. From Tuesday 31st December 1793 to Saturday 4th January 1794.
To the Right Honorable Arthur Viscount Valentia [aged 49], and the Heirs Male of his Body lawfully begotten, the Dignity of Earl Mountnorris, of Mountnorris Castle, in the County of Armagh.
To the Right Honorable Andrew Thomas Lord Castlestewart [aged 68], and the Heirs Male of his Body lawfully begotten, the Dignity of Viscount Castlestewart, in the County of Tyrone.
On 26th August 1809 Andrew Thomas Stewart 1st Earl Castle Stewart [aged 83] died. His son Robert [aged 25] succeeded 2nd Earl Castle Stewart in Tyrone, 2nd Viscount Castle Stewart in Tyrone, 10th Baron Castle Stuart of County Tyrone.