Surname Oostra (Oostra 
) , globally, is quite a rare cognomen. The surname Oostra is habitual in Netherlands, where it is quite a rare surname, Belgium, where it is a rare surname, and the United States, where it is a very rare surname.
| VARIANT | COUNTRY |
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| Oostra | Australia, Canada, United States, Netherlands, Belgium |
| roel oostra Dutch writer, NL (b. 1921) |
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| roel oostra (b. 1946) |
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| martijn oostra Dutch photographer, NL (b. 1971) |
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| dorien l oostra researcher |
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| arnold oostra Ph.D. Universidad Nacional de Colombia 2007 |
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| roelof-jan oostra researcher |
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| ellen oostra researcher |
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| folkert oostra cyclist, NL (b. 1989) |
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| a. oostra |
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| simon oostra |
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| ben a oostra |
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