Aldo Andretti (born February 28, 1940 in Montona d'Istria, Italy (now Motovun, Croatia)) is the twin brother of Mario Andretti and the father of John Andretti and Adam Andretti. He is the uncle of Michael Andretti and Jeff Andretti, and great-uncle of Marco Andretti. Aldo and Mario are identical twins. However, due to facial reconstructive surgery following a major racing accident, Aldo does not look identical to Mario.
Read more about Aldo Andretti: Background, Racing Career