Princess Margaret, Countess of Snowdon
In 1960, she married the photographer Anthony Armstrong-Jones, who was made Earl of Snowdon. They had two children, David Armstrong-Jones, 2nd Earl of Snowdon born in 1961 and Lady Sarah Chatto born in 1964. After they divorced in 1978, she was known as Princess Margaret Countess of Snowdon; the Earl's new wife was simply the Countess of Snowdon. Armstrong-Jones died in January 2017, almost 15 years after Margaret.