Again....John L. Sullivan was married to Annie Bates and had a son, John L. Sullivan, Jr. who died as a toddler. HE WAS THE ONLY CHILD JOHN L. SULLIVAN HAD. So no one can be the child, grandchild, great grandchild, etc of John L. Sullivan. His sister Annie had eight children who grew to adulthood. So far, their descendants are the closest relatives to the boxer that have been able to prove it.