Lady Gwendolen K. G. Osbourne, b: 1885 -

^{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}



	^{Lt-Col-Eustance Gascoyne-C}^{b. d.}

^{Algernon Cecil}^{b.1897 d.1953}

	^{Lady Gertrude Louisa Scott}^{b. d.}

		^{George Godolphin Osbourne}^{b.1828 9th Duke of Leeds d.1895}

	^{George Godolphin Osbourne}^{b.1862 10th. Duke of Leeds d.1927}	^{Hon-Frances Georgiana Pitt-Rivers}^{b.1836 d.1896}

^{Lady Gwendolen K. G. Osbourne}^{b.1885 d.1933}		^{George F D Lambton}^{b. 2nd Earl of Durham d.}

	^{Lady-Katherine Frances Lambton}^{b.1862 d.1952}	^{Lady-Beatrix Frances Hamilton}^{b. d.}