William Jacka, b: 1763

^{1830 French Revolution}
^{1837 Queen Victoria assumes throne}
^{1854 Crimean War with Russia}
^{1869 Opening of Suez Canal}
^{1871 Franco - Prussian War}

^{1789 French Revolution begins}
^{1798 Irish revolt against English rule}
^{1804 Napoleon becomes French Emperor}
^{1805 Battle of Trafalgar, Nelson killed}
^{1815 Battle of Waterloo, Napoleon defeat}

^{1740 War of Austrian Succession begins}
^{1762 Catherine II becomes Czarina/Russia}
^{1770 Cook discovers New South Wales}
^{1776 America declares independence}
^{1789 Geo. Washington 1st USA president}




		^{Thomas Jacka}^{b.1733 St Buryan, England d.1796 St Erth}

^{William Jacka}^{b.1794 Cornwall, England d.1860 St Loy, Cornwall, England}	^{William Jacka}^{b.1763 Sithney d.}

^{Joseph Wood Jacka}^{b.1798 Phillack d.1799 St Erth}		^{Elizabeth Gilbert}^{b. d.1795 St Erth}

^{Elizabeth Jacka}^{b.1795 Breage d.}

^Mary Jacka^{b.1797 Phillack d.}

^James Jacka^{b.1802 St Erth d.}	^{Margaret Wood}^{b. d.}

^{Thomas Jacka}^{b.1799 d.1802 St Erth}

^{Elizabeth Jacka}^{b.1793 Germoe, England d.}