Last name Thorsteinsen (Thorsteinsen 
) , in the world, is a rare cognomen. The last name Thorsteinsen is habitual in Norway, where it is quite a rare surname, Australia, where it is a rare surname, and Austria.
| VARIANT | COUNTRY |
|---|---|
| Thorsteinsen | Norway, France, Austria, Australia, United States |
Thorsteinson, Thorsteinsson, Thorstensen, Thorstenson, Thorstensson, Torstensen, Torstenson, and Torstensson
| cecilie thorsteinsen Norwegian handball player (b. 1974) |
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| jonette thorsteinsen Australian politician, AU |
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| kjærsti thorsteinsen researcher |
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