Chalmers Edward FitzJohn Trench, b: 1909 -

^{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}


			^{John Alfred Trench}^{b.1839 d.1922}

		^{Wilbraham FitzJohn Trench}^{b.1873 d.1939}	^{Jenetta Wilbraham Taylor}^{b. d.1925}

	^{Chalmers Edward FitzJohn Trench}^b.1909 d.		^{Edward Cross}^{b. Hollywoo, County Dublin. d.}

^{F T W Trench-McMahon}^{b. d.}		^{Mary Alicia Cross}^{b. d.1930}

^{B A W Trench}^{b. d.}

^{B M W Trench}^{b. d.}		^{Charles St.George Orpen}^{b. Lisheens, County Dublin. d.}

	^{Beatrice Esther Orpen}^{b. d.1980}