The Indy Family Name is a term used to refer to two of the most successful drivers in the history of the Indianapolis 500. The two drivers are Unser (5 letters) and Foyt (4 letters). Unser is a surname that has been associated with racing since the 1950s, when Al Unser Sr. began his career. His sons, Al Jr. and Bobby, have both won the Indy 500 multiple times. Foyt is the surname of A.J. Foyt, who is considered one of the greatest drivers in the history of the sport. He won the Indy 500 four times and is the only driver to win the race in four different decades.