Ancestors of Robert Vernon Blettenberg

             /--Robert Blettenberg  b. 23 MAR 1943 at Jersey City, NJ  d. 14 JUL 2014
Robert Vernon Blettenberg
             |       /--John Doran Mumma  b. 3 APR 1905 at Germantown, Montgomery Co., OH  d. 7 JUL 1960 =>
             \--Patricia Annette Mumma
                     \--Genevieve Whitlock  b. 28 MAY 1922 at Axtell, UT