Curtis Hoppin Duncan, b: 1905 - Ft. Ethan Allen, VT

^{1922 USSR formed by Soviet states}
^{1939 - 1945 World War II}
^{1945 Atomic bomb detonated (Hiroshima)}
^{1950 Korean War begins}
^{1964 - 1973 Vietnam War}

^{1895 Marconi invents wireless telegraphy}
^{1899 Boer War begins}
^{1903 Wright brothers 1st plane flight}
^{1912 Titanic sinks on maiden voyage}
^{1914 - 1918 World War I}

^{1830 French Revolution}
^{1837 Queen Victoria assumes throne}
^{1854 Crimean War with Russia}
^{1869 Opening of Suez Canal}
^{1871 Franco - Prussian War}


			^{James Hiram Duncan}^{b.1833 Springfield, IL d.1900 Linden, CA}

		^{George Orcenith Duncan}^{b.1868 Linden, CA d.1933 Walnut Creek, CA}	^{Sarah Ann Moore}^{b.1837 Lexington, MO d.1920 Stockton, CA}

	^{Curtis Hoppin Duncan}^{b.1905 Ft. Ethan Allen, VT d.1987 Riverside, Co., CA}		^{Cornelius Waite}^{b.1841 Leicester, England d.1928 Walnut Creek, CA}

^G. Duncan^{b. d.}		^{Lizzie Adelaide Waite}^{b.1877 Oakland, CA d.1959 Walnut Creek, CA}	^{Mary Ann Johnson}^{b.1839 Lincolnshire, England d.1924 Walnut Creek, CA}

^{R. C. Duncan}^{b. d.}

		^{Ernest Joy Frentress}^{b. d.}

	^{Helen Virginia Frentress}^{b.1911 Oakland, CA d.1974 Riverside, Co., CA}

		^{Maud Ethel Kimball}^{b. d.}