Robert Peter Helfer
1922 - 1993 (70 years)Drag or scroll to see more of the chart.
Johannes Jakob Helfer
1829-1908
1829-1908
Christina Roth
1830-1879
1830-1879
George R. Kolb
1830-
1830-
Magdalena Hill
1830-
1830-
Peter Helfer
1861-1923
1861-1923
Catharina Kolb
1858-1922
1858-1922
Frederick F. Helfer
1896-1980
1896-1980
Hildgard Same
1900-1960
1900-1960
Robert Peter Helfer
1922-1993
1922-1993