Surname Determan (Determan 
) , around the world, is quite a rare last name. The surname Determan is habitual in Netherlands, where it is a rare surname, the United States, and Canada, where it is a very rare surname.
| VARIANT | COUNTRY |
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| Determan | Canada, New Zealand, United Kingdom, United States, Netherlands |
| leo determan Dutch sailor, NL (b. 1949) |
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| sara-ann determan lawyer |
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| mike determan college basketball player (1992–1993) Texas State |
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| john j determan researcher |
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| steve determan college basketball player (1998–2001) Northern Illinois |
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| jeroen determan |
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