John G. O'Leary, b: 1875 -

^{1899 Boer War begins}
^{1903 Wright brothers 1st plane flight}
^{1912 Titanic sinks on maiden voyage}
^{1914 - 1918 World War I}
^{1922 USSR formed by Soviet states}

^{1837 Queen Victoria assumes throne}
^{1854 Crimean War with Russia}
^{1869 Opening of Suez Canal}
^{1871 Franco - Prussian War}
^{1895 Marconi invents wireless telegraphy}

^{1798 Irish revolt against English rule}
^{1804 Napoleon becomes French Emperor}
^{1805 Battle of Trafalgar, Nelson killed}
^{1815 Battle of Waterloo, Napoleon defeat}
^{1830 French Revolution}


			^{Cornelius O'Leary}^{b.1804 Youghal, Cork, Ireland d.1890 Michigan}

		^{Thomas J. O'Leary}^{b.1835 Milan, Ohio d.1903 Hutchinson, Kansas}	^{Jane Griffen}^{b.1797 Charleville, Ireland d.1886 Milan, Erie, Ohio}

	^{John G. O'Leary}^b.1875 d.		^{Richard H. Boyle}^{b. d.}

^{Alta O'Leary}^{b.1899 Pretty Prarrie, Ks. d.1908 Pretty Prarrie, Ks.}		^{Angeline Boyle}^{b.1846 Ohio d.1914 Hutchinson, Kansas}	^{Eliza J. Lutts}^{b. d.}

^{Alpha O'Leary}^{b.1899 Pretty Prarrie, Ks. d.}

^{Harold Vernon O'Leary}^{b. Private d.}

	^{Mary E. Button}^{b. d.}