Grace Johnstone

(died 1836) (1761–1836)

Parents

• William Johnstone

Children

• John Douglas, 7th Marquess of Queensberry
• unknown daughter Douglas
• unknown daughter Douglas
• unknown daughter Douglas
• Lady Mary Douglas
• Henry Alexander Douglas
• Charles Douglas, 6th Marquess of Queensberry
• Lord William Douglas

Partners

• Sir William Douglas, 4th Baronet