Surname Ladouceur (Ladouceur 
) , all around the world, is quite a common last name. The surname Ladouceur is habitual in Mauritius, where it is quite a common surname, Canada, and Haiti, where it is quite a rare surname. Measured by absolute frequency, the name is most common in Canada, the United States, and Haiti.
| VARIANT | COUNTRY |
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| Ladouceur | Haiti, Mauritius, United States, New Zealand, Canada |
| clodomir ladouceur CA (b. 1907) |
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| jean-paul ladouceur Canadian film director (1921-1992), CA (b. 1921) |
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| fernand ladouceur Canadian politician, CA (b. 1925) |
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| gilles ladouceur professor at Université Laval, CA (b. 1929) |
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louis-philippe ladouceur American football player, CA (b. 1981) |
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| robert ladouceur psychologist and university professor, CA (b. 1945) |
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| serge ladouceur Canadian cinematographer, CA (b. 1952) |
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| paul ladouceur (b. 1944) |
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| bob ladouceur American football player and coach, US (b. 1954) |
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| françois ladouceur (b. 1947) |
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| jacques ladouceur university professor, CA (b. 1958) |
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| jacques ladouceur American soccer player-coach, HT (b. 1959) |
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| randy ladouceur Canadian ice hockey defenceman, CA (b. 1960) |
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| dan ladouceur lacrosse player, CA (b. 1973) |
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| magalie ladouceur researcher (b. 1975) |
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