Family name Oortman (Oortman 
, Ортман 
) , in all the world, is a rare cognomen. The last name Oortman is habitual in Netherlands, where it is quite a rare surname, Kazakhstan, where it is a rare surname, and South Africa. Very seldom, Oortman is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Oortman | Netherlands, South Africa, United States, Belgium, Germany |
| Ортман | Kazakhstan, Belarus, Kyrgyzstan, Russia, Ukraine |
|
petronella oortman Dutch art collector, NL (b. 1656) |
|
| suzanna maria oortman (b. 1700) |
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| jan oortman Dutch draughtsman and printmaker, NL (b. 1753) |
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| joachim jan oortman Dutch engraver, active in Paris, FR (b. 1777) |
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| gerrit oortman NL (b. 1781) |
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| dirkje oortman Dutch Righteous Among the Nations, NL |
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| g. oortman |
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