There is an IN marriage record for a Simon Peter DOERNER, b. 8-Dec-1880, to Dora Ida MASON, b. 14-Aug-1889, on 31-Mar-1917 in Pike Co, IN. Groom's parents were Fred G. DOERNER and Margaret ARNOLD. Bride's parents were James A. MASON and Sarah A. HEATH.
This Simon claims to have been born in Vanderburgh, IN. Census records show his parents b. in Germany. His Findagrave page matches the death date for the Simon you are looking for: