Lee had eight siblings - most of whom from what I've gathered weren't involved in racing. One older brother, however, Julius Hilton (Julian) Petty was a NASCAR regular.
In addition to the three starts he made as a driver, he fielded a car for NASCAR pioneer Jimmie Lewallen in the early 1950s. The garage he owned and operated also sponsored Lewallen for a couple of races in 1953 when Jimmie ran the car number later made famous by Julian's nephew.
|Source: Wilmington News via Google News Archive|
Julian's son and Richard's cousin - Gene Petty - was involved in racing as well. Gene was instrumental in helping Mike Skinner get his start in NASCAR.