Who was John Harvey Kellogg family?

John Harvey Kellogg was born on February 26, 1852, in Tyrone, Michigan, to a family of devout Seventh-day Adventists. He was the son of John Preston Kellogg and Ann Ella Starbuck. Kellogg married Ella Eaton in 1879, and they adopted a son, but the couple had no biological children. His brother, Will Keith Kellogg, co-founded the Kellogg Company, which became famous for breakfast cereals.