Last name Jansonius (Jansonius 
) , globally, is a rare cognomen. The family name Jansonius is characteristic of Netherlands, where it is a rare surname, Canada, where it is a very rare surname, and the United States.
| VARIANT | COUNTRY |
|---|---|
| Jansonius | South Africa, Canada, United States, Mexico, Netherlands |
| jacobus jansonius NL (b. 1547) |
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| maria jansonius (1620-1703) (b. 1620) |
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| gustavus joannis jansonius SE (b. 1618) |
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| jan jansonius politician (1870-1957), NL (b. 1870) |
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| jan jansonius Dutch born Canadian geologist and botanist (1928-2013), CA (b. 1928) |
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johannis freerk jansonius |
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| johan jansonius (b. 1932) |
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| ryan p jansonius researcher |
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| c. jansonius |
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| susanna jansonius |
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