John Parke Custis was born around the start of 1754 and lived to adulthood.
Born around January 1754, John Parke Custis, known as Jacky, became the primary male heir in the Custis family. He survived to adulthood, unlike his siblings, and was a key figure in Martha's later life. She and George Washington played pivotal roles in caring for Jacky's children following his death in 1781.