Original: 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.
Simplified: Earnhardt is the son of the seven time Sprint cup champion Dale Earnhardt.