From the Mayflower History Website, http://www.mayflowerhistory.com by Caleb H. Johnson:
Mary Allerton was born about 1616 in Leiden, Holland, to parents Isaac and Mary (Norris) Allerton. She came to Plymouth on the Mayflower in 1620, at about the age of four. Around 1636, she married Thomas Cushman. Thomas had come to Plymouth at the age of 13 on the ship Fortune in 1621 with father Robert Cushman, a prominent member of the Pilgrims' congregation in Leiden. Thomas and Mary had a surprisingly prosperous family: seven of their eight children survived to adulthood, got married, and provided at least 50 grandchildren. Thomas and Mary both lived to very old age, having never moved from Plymouth. Thomas died in December 1691, nearly reaching 85 years in age. Mary, who gave birth to and raised eight children, lived to the age of 83. Prior to her death in November 1699, she was the last surviving Mayflower passenger.