Archie James McKay, b: 1921 - Watervale, South Australia

^{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}



	^{Archibald McKay}^{b.1874 Clare, South Australia d.1942 Clare, South Australia}

^{Archie James McKay}^{b.1921 Waterval, South Australia d.2002 Clare, South Australia}		^{Lionel Henry London}^{b. London, England d.}

	^{Nina Olive London}^{b. South Australia d.1961 Clare, South Australia}	^{Rositta Annie Knibbs}^{b. London, England d.}

		^{Gustaf Wilhelm Trygg}^{b.1832 Verkstrand, Finland d. Finland}

	^{Carl Yolmar Trygg}^{b.1877 Kimito, Finland d.1944 Port Pirie, South Australia}	^{Eva Gustava Bjur}^{b.1835 Finland d.}

^{Doris Linda Trigg}^{b.1921 Port Pirie, South Australia d.1981 Clare, South Australia}		^{James Stephen Pressley}^{b.1851 Herne Bay, Kent, England d.1946 Adelaide, South Australia}

	^{Lydia Emily Pressley}^{b.1879 Adelaide, South Australia d.1956 Port Pirie, South Australia}	^{Elizabeth Jarvis}^{b.1859 Canterbury, England d.1940 Adelaide, South Australia}