Family name Sønnichsen (Sønnichsen 
) , in the entire world, is a rare cognomen. The cognomen Sønnichsen is characteristic of Denmark, where it is quite a rare surname, Norway, where it is a very rare surname, and Germany.
| VARIANT | COUNTRY |
|---|---|
| Sønnichsen | Germany, Norway, Denmark |
Soennichsen, and Sonnichsen
| søren sønnichsen (b. 1765) |
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francis sønnichsen (b. 1881) |
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| sønke sønnichsen (b. 1840) |
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ole sønnichsen DK (b. 1973) |
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Ken, Niels, Ernst, Hanne, Helle, Hilde, Oskar, Yelva, Martin, Malene, Magnus, Simone, Stefan, Anders, Rasmus, Daniel, Dorthe, Thomas, Torben, Henrik, Helene, Oliver, Nanna, Jytte, Jonas, Jakob, Eva, Ole, Mads, Alan, Anna, Anne, Lars, Lone, Jens, Tina, Michael, Tine, Inge, Maria, Sanne, Anton, Anker, Bodil, Karin, Peter, Gerda, Linda, Hans, and Susanne