My Mother-in-law married a John Middlekamp in Michigan in the 1950s. He was an accomplished engineer involved in transportation, and was born about 1910. His first wife had died, and his family was situated in the Richmond, VA area. He also died, of cancer, not long after marrying my Mother-in-law. I do not know whether he had any children from his first marriage. I have access to more information about him, should any reader be interested. The spelling of his name is correct.