Globally, Jansonius (Jansonius 
) is an extremely rare unknown gender first name. Much more prevalently, Jansonius is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Jansonius | Netherlands, Canada, Mexico, United States, South Africa |
| nomdo marten jansonius (b. 1966) |
|
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| nomdo m jansonius researcher |
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