Willie Nelson also made a friend named Mary Haney on the set of the 1986 film "Stagecoach," in which he portrayed the late Doc Holiday. And the friendship must have been intimate, because he found out in 2012 that he and Haney share a child. He told the Daily Express that by the time he met his daughter, she already had a family of her own. "I have an old, dear friend, Mary Haney, who I'd lost touch with but recently met again after decades," Nelson said. "Turns out Mary and I had a child together called Renee. It also turns out Renee has a daughter, Noelle, who has a daughter, ­Jordan, who I am happy to now call my great-granddaughter. My newly discovered family sure took some time to surface."

Willie and Martha Nelson's son Billy had a child of his own before passing away, a daughter named Raelyn (per Eat, Play, Rock). Along with a music career of her own, Realyn also has three children, twin boys and a daughter. Willie and Martha's other child, Lana, is also a parent; she has a daughter named Rachel. Nelson's daughter Amy Lee also has children of her own: Lukas Autry Nelson and Jacob Micah Nelson. 

Not just a grandfather (to five grandchildren, as of this writing), but a great-grandfather as well, Willie Nelson seems to be close with all of his family. The Nelson family is large and varied, but they all appear to remain connected through the years; quite the feat with so many members!