I Jónsson, b: -

^{1969 Armstrong first person on moon}
^{1986 Nuclear disaster at Chernobyl}
^{1989 Berlin wall falls}
^{1991 Persian Gulf War}
^{1991 Break-up of the Soviet Union}

^{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}




^{J A Ingólfsson}^{b. d.}	^I Jónsson^{b. d.}

^{Örn Helgi Ingólfsson}^{b.1955 Iceland d.1979}

^{G E Ingólfsdóttir}^{b. d.}			^{Guðmundur Helgi Jakobsson}^{b.1881 Undirfell, Iceland d.1954}

^{H G Ingólfsson}^{b. d.}		^{Árilíus Engilbert Guðmundsson}^{b.1913 Iceland d.1941}	^{Guðlaug Helga Klemensdóttir}^{b.1887 Iceland d.1938}

	^{I S Arilíusar}^{b. d.}

		^{Vigdís Steina Ólafsdóttir}^{b.1916 Læknishúsinu (hinu eldr d.2013}