Hjalmar Pjetur Gudmundson, b: 1910

^{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}


		^{Guðmundur Jónsson}^{b.1825 Sveinsstaðir, Iceland d.1881}

	^{Havardur Gudmundsson}^{b.1862 Sveinsstaðir, Iceland d.1939 Hayland, Canada}	^{Gunnhildur Ólafsdóttir}^{b.1829 Hellis, Suður-Múlasýsla d.1910 not shown in the 1910 c}

^{Hjalmar Pjetur Gudmundson}^{b.1910 Siglunes, Manitoba d.1974 Winnipeg Mb.}		^{Sigurður Árnason}^{b.1823 Syðra Vallholt, Iceland d.1899}

	^{Stefanía Guðný Sigurðardóttir}^{b.1872 Desjamýrarsókn, Iceland d.1951 Ralph Connor, Canada}	^{Guðrún Sigfúsdóttir}^{b.1844 Desj, Norður-Múlasýsla d.}





^I Cope^{b. d.}