William Cornelius Koppenheffer, b: 1897 -

^{1939 - 1945 World War II}
^{1945 Atomic bomb detonated (Hiroshima)}
^{1950 Korean War begins}
^{1964 - 1973 Vietnam War}
^{1969 Armstrong first person on the moon}

^{1903 Wright brothers 1st plane flight}
^{1908 Ford produces Model T}
^{1913 Edison invents movies w/sound}
^{1914 - 1918 World War I}
^{1929 The Great Depression begins}

^{1861 - 1865 Civil War, North vs. South}
^{1867 Alaska Territory purchased}
^{1869 Transcontinental Railroad complete}
^{1879 Edison invents phono/light bulb}
^{1898 Spanish-American War}




^{John Andrew Koppenheffer}^{b.1919 d.1983}	^{William Cornelius Koppenheffer}^{b.1897 d.1976}

^{Virginia Mae Koppenheffer}^b.1924 d.

^{Morris Ray Koppenheffer}^{b.1927 , d.}

^{Ellen Adeline Koppenheffer}^{b.1930 , d.}		^{John Adam (Dutch) Laudenslager}^{b.1875 d.1938}

	^{Sarah Elizabeth Laudenslager}^{b.1897 d.1972}		^{Daniel K. Witmer}^{b.1854 Lower Mahanoy Townshi d.1920}

		^{Lilly Adeline Witmer}^{b.1876 Lykens Township, d.1934}	^{Mary Ann Ossman}^{b.1854 d.1920}