Janet Colquhoun (pronounced /kəˈhuːn/; née Sinclair; also known as Janet Sinclair and Lady Colquhoun of Luss; 17 April 1781 – 21 October 1846) was a British religious writer. In her first book, James Hogg says that she concluded that "blind faith offers the only hope from the 'bottomless pit'." She was a philanthropist who was involved with several good causes and her it is said that she believed that the "fruits of faith will be evident in good work".