There are several notable people named Sarah Lennox, so it depends on which one you are referring to. One is Sarah Lennox, Duchess of Richmond and Lennox, who was a prominent figure in British society during the 18th century. Another is Sarah Lennox, one of the Lennox Sisters, who were known for their beauty and connections to British royalty in the 18th century. Without more context, it is difficult to provide a specific answer.