Last name Mortlock (Mortlock 
) , all around the world, is quite a rare cognomen. The family name Mortlock is habitual in Australia, where it is quite a rare surname, the United Kingdom, and New Zealand. Measured by absolute frequency, it is the most numerous in the United Kingdom, Australia, and South Africa.
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| Mortlock | Australia, United Kingdom, South Africa, United States, New Zealand |
| richard mortlock 18th cent. graduate of Cambridge (b. 1655) |
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john mortlock British politician, MP and 13-times mayor of Cambridge (1755-1816) (b. 1755) |
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william ranson mortlock Australian politician, GB (b. 1820) |
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| james mortlock (b. 1760) |
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william mortlock Australian politician (1858-1913), AU (b. 1858) |
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| j. f. mortlock (b. 1809) |
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| will mortlock English cricketer (1832-1884) (b. 1832) |
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| ethel mortlock British portraitist and painter, GB (b. 1865) |
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| edward mortlock (b. 1859) |
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bryce mortlock Australian architect (1921-2004), AU (b. 1921) |
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| ethel mortlock GB (b. 1878) |
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| charles bernard mortlock Anglican priest (1888-1967), canon of Chichester Cathedral, historian, drama and ballet critic, GB (b. 1888) |
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| harry mortlock cricketer (1892-1963), GB (b. 1892) |
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| john andrew tennant mortlock (1894-1950) benefactor and pastoralist (b. 1894) |
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| dorothy elizabeth mortlock (1906-1979) philanthropist (b. 1906) |
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