A Complete Breakdown of the Crawley Family From "Downton Abbey"

After the Titanic tragedy, the heir to Downton is Matthew Crawley, Robert's third cousin once removed. Matthew, along with his widowed mother, Isobel, move to Downton to join the family and learn about the estate. Despite getting off to a rocky start, Matthew falls in love with Robert's eldest daughter, Mary. They marry and have a son, George, but Matthew dies in a car accident the same day their son is born.

Isobel remains a part of the family even after Matthew's death, developing a prickly rivalry/friendship with Violet in particular. Eventually, she remarries as well, marrying Richard "Dickie" Grey (aka Lord Merton) and becoming a baroness.