Theresa Susey Helen Talbot (1856-1919) was the daughter of Charles Chetwynd-Talbot, 19th Earl of Shrewsbury. She married Charles Vane-Tempest-Stewart, 6th Marquess of Londonderry in 1875, and became a society leader and President of the Ulster Women’s Unionist Council. Her son Charles became the 7th Marquess of Londonderry.