Last name Deinum (Deinum 
) , in all the world, is a rare family name. The surname Deinum is characteristic of Netherlands, where it is quite a rare surname, Switzerland, where it is a rare surname, and Romania.
| VARIANT | COUNTRY |
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| Deinum | United States, Switzerland, Romania, Canada, Netherlands |
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hans deinum Dutch resistance fighter in WW-II, 1920-2003, NL (b. 1920) |
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herman deinum Dutch guitarist and pianist, NL (b. 1946) |
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| henk deinum Dutch physicist and resistance fighter in WW-II, 1915-1992, NL (b. 1915) |
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| andries deinum (b. 1918) |
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| eva elisabeth deinum researcher |
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| dick deinum botnist |
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| jaap deinum |
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