I have come across a 1920 US Fed Census listing a widower, John Umiker, living with the family of Henry Matyen (Matgen) in Iowa. John was born abt 1844 and was born in Switzerland. I am wondering if he might be Johannes Umiker, son of Jacob Umiker (born 1808). I only have a birthdate (25 May 1843)for him and no other information. I assume there is some familial relation between this John and Henry. Also, I found a Henry Matgen listed as an unmarried servant of Henry A Ahlers in Plymouth county, Iowa in the 1900 census. Probably the same one?