Original sentence: , and grandson of Frank C.He is the current chairman of Mars, Incorporated.John Franklyn Mars is the son of Forrest Mars, Sr.List of billionaires.Mars family.Mars, founders of the giant American candy company Mars, Incorporated.With his share of the company, he is worth $10.5 billion as of 2006 and is the 27th richest person in the world, according to Forbes.com: Forbes World's Richest People.fr:John Mars.he is 58th richest person in the world