Earnhardt is the son of the seven time Sprint cup champion Dale Earnhardt . He is the son of the late NASCAR Hall of Famer Dale Earnhardt , Sr. , and the grandson of both the late NASCAR driver Ralph Earnhardt and Robert Gee , the well known stock car fabricator . Earnhardt Jr. is also the half-brother of former driver Kerry Earnhardt , the uncle of driver Jeffrey Earnhardt , and the stepson of Earnhardt Ganassi Racing team co-owner Teresa Earnhardt .