Family name Colbiørnsen (Colbiørnsen 
) , across the world, is an extremely rare cognomen. The surname Colbiørnsen is characteristic of Northern Europe, particularly Norway, where it is a very rare surname.
| VARIANT | COUNTRY |
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| Colbiørnsen | Norway |
| roar colbiørnsen Norwegian writer (b. 1895) |
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| kjell torstein colbiørnsen Norwegian architect (b. 1914) |
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| elisabeth colbiørnsen Norwegian editor, writer, feminist, librarian (b. 1917) |
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| sidsel colbiørnsen Født 25. januar 1942 Fødested Oslo Alternative navn Opdahl, Sidsel, NO (b. 1942) |
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