The term McDonald's Founder can be summarized by two crossword solutions: KROC (4 letters) and RAYKROC (7 letters). KROC stands for the surname of the founder, Ray Kroc. Ray Kroc was an American businessman who is best known for his role in expanding McDonald's from a small chain to the world's most successful fast-food corporation. He purchased the franchise rights to McDonald's in 1954 and built it into a global brand. Kroc was also responsible for introducing the concept of franchising to the fast-food industry.