Surname Seijen (Seijen 
) , worldwide, is a rare last name. The cognomen Seijen is habitual in Netherlands, where it is a rare surname, Spain, where it is a very rare surname, and the United States, where it is an extremely rare surname. Very seldom, Seijen is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Seijen | India, Spain, Netherlands, United States |
| ad van seijen Frisian writer and translator, NL (b. 1922) |
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| maartje van seijen researcher |
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| harm van seijen Ph.D. Universiteit van Amsterdam 2011, NL |
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S J, Ellen, Femke, Ineke, Martin, Moniek, Melisa, Michel, Timmy, Desley, Joshua, Nicole, Hellen, Wesley, Wolter, Yvonne, Sjoukje, Gerard, Jelle, Jerry, Janou, Jan, J H, H H, Mick, Anne, Remy, Guus, Leon, Joey, Elly, Eloy, Harm, Henk, Marjo, Siebe, Peter, Donny, Barbara, and Patrick