Cognomen Lonergan (Lonergan 
) , across the world, is quite a common surname. The surname Lonergan is characteristic of Ireland, where it is quite a common surname, Australia, where it is quite a rare surname, and New Zealand. In absolute terms, it is the most numerous in the United States, Ireland, and Australia.
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thomas lonergan politician in Massachusetts, US (1827-1887), US (b. 1827) |
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john lonergan American Civil War Medal of Honor recipient (1839-1902), IE (b. 1839) |
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lloyd lonergan American screenwriter, US (b. 1870) |
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augustine lonergan American politician (1874–1947), US (b. 1874) |
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bernard lonergan Canadian philosopher and theologian, CA (b. 1904) |
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| maria sarah lonergan (b. 1851) |
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lenore lonergan film actress (1928-1987), US (b. 1928) |
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| bill lonergan Australian rules footballer, AU (b. 1884) |
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| william i. lonergan Jesuit and former President of the University of San Francisco, US (b. 1884) |
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| walter lonergan American baseball player, US (b. 1885) |
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| philip lonergan American screenwriter (1887-1940), US (b. 1887) |
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| john joseph lonergan Australian priest (1888-1938), AU (b. 1888) |
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| john lonergan American artist, US (b. 1896) |
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| steven lonergan Australian public servant and politician in Papua New Guinea, AU (b. 1899) |
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| richard lonergan Leader of the White Hand Gang, US (b. 1900) |
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