Surname Leonardsen (Leonardsen 
) , across the world, is a rare family name. The cognomen Leonardsen is characteristic of Norway, where it is quite a rare surname, Denmark, where it is a rare surname, and the United States, where it is an extremely rare surname. Very seldom, Leonardsen is the forename as well as the last name.
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| Leonardsen | Norway, Brazil, Denmark, United States, Philippines |
Leonardson, and Leonhardsen
| erik leonardsen former leader of the X-Ray Diffraction Laboratory of the Geological Institute, University of Copenhagen; Hundested, Denmark (b. 1934) |
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| frode leonardsen Norwegian singer and musician (b. 1974) |
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| terje leonardsen Norwegian footballer (b. 1976) |
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| ann-chatrin linqvist leonardsen researcher |
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| andreas daugstad leonardsen director and filmmaker |
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