Ancestors of William Robert Gerbig

                     /--Robert Elwood Gerbig
             /--Ronald Elwood Gerbig
             |       \--Mildred Gladys Vivian
William Robert Gerbig
             |               /--Howard Jacob Mumma  b. 11 JAN 1868 at Mechanicsburg, Cumberland Co., PA  d. 14 JAN 1947
             |       /--William Kepple Mumma  b. 7 SEP 1900 at Wormleysburg, Cumberland Co., PA  d. 28 JUL 1958
             |       |       \--Florence V. Spencer  b. 20 JAN 1871 at Wormleysburg, Cumberland Co., PA  d. 26 JUN 1930
             \--Shirley Marie Mumma  d. 15 JUL 1997
                     |       /--Charles Bernard Hoffman
                     \--Nellie May Hoffman  b. 18 MAR 1907 at Wormleysburg, Cumberland Co., PA  d. 5 JUN 1973
                             \--Margaret May Cullison