H Jónasson, b: -

^{1945 Atomic bomb detonated (Hiroshima)}
^{1950 Korean War begins}
^{1964 - 1973 Vietnam War}
^{1969 Armstrong first person on moon}
^{1986 Nuclear disaster at Chernobyl}

^{1903 Wright brothers 1st plane flight}
^{1912 Titanic sinks on maiden voyage}
^{1914 - 1918 World War I}
^{1922 USSR formed by Soviet states}
^{1939 - 1945 World War II}

^{1854 Crimean War with Russia}
^{1869 Opening of Suez Canal}
^{1871 Franco - Prussian War}
^{1895 Marconi invents wireless telegraphy}
^{1899 Boer War begins}


			^{Gunnar Ólafsson}^{b.1848 Reynistaðarsókn d.1949}

		^{Jónas Jón Gunnarsson}^{b.1891 Keflav, Skagafjarðarsýsla d.1939}	^{Sigurlaug Magnúsdóttir}^{b.1865 Rípur, Skagafjarðarsýsla d.1938}

^{S H Hallsdóttir}^{b. d.}	^H Jónasson^{b. d.}		^{Sigurjón Markússon}^{b.1868 Glaum, Skagafjarðarsýsla d.1919}

^{J J Hallsson}^{b. d.}		^{Steinunn Sigurjónsdóttir}^{b.1891 Glaum, Skagafjarðarsýsla d.1981}	^{Guðrún Magnúsdóttir}^{b.1863 Glaum, Skagafjarðarsýsla d.1901 husband shown as widow}

^{H Hallsdóttir}^{b. d.}

^{J Hallsdóttir}^{b. d.}

	^{A A Jónsdóttir}^{b. d.}