Will Keith Kellogg, generally referred to as W.K. Kellogg, was an American industrialist in food manufacturing, best known as the founder of the Kellogg Company, which to this day produces a wide variety of popular breakfast cereals. He was a member of the Seventh-day Adventist Church and practiced vegetarianism as a dietary principle taught by his church. Later, he founded the Kellogg Arabian Ranch and made it into a renowned establishment for the breeding of Arabian horses. Kellogg started the Kellogg Foundation in 1934 with $66 million in Kellogg company stock and investments, a donation that would be worth over a billion dollars in today's economy. Kellogg continued to be a major philanthropist throughout his life.

https://en.wikipedia.org/wiki/Will_Keith_Kellogg