Adolf "Adi" Dassler founded the German sportswear company Adidas in the 1920s. He began by making homemade slippers with his family in Germany. In the 1920s, he started a shoe company with his brother Rudolph. After a falling out with his brother in 1948, Adi took his nickname and last name initial to create the brand name "Adidas." Through innovative shoe designs and marketing to athletes, Adidas became hugely successful. Adi Dassler is credited with revolutionizing the sportswear industry.