Family name Sioen (Sioen 
, سيوين 
, Сиюн 
) , across the world, is quite a rare last name. The cognomen Sioen is characteristic of Belgium, where it is quite a common surname, France, where it is a very rare surname, and Canada. Very seldom, Sioen is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Sioen | Canada, France, United States, India, Belgium |
| سيوين | Iran |
| Сиюн | Russia |
| aquiles sioen French-born Argentinian journalist and writer (b. 1834) |
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sioen Belgian singer-songwriter, BE (b. 1979) |
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| gérard sioen French photographer, born 1952, NL (b. 1952) |
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| michèle sioen Belgian businesswoman, BE (b. 1965) |
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| isabelle sioen researcher ORCID ID = 0000-0002-7139-9691 |
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| simon sioen researcher |
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| mark sioen Ph.D. Universiteit Antwerpen 1997 |
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| geert sioen researcher |
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| gustaaf sioen |
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| jacqueline sioen-zoete BE |
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| jean-jacques sioen BE |
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| oscar sioen |
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Mr, Peter, Roger, Danny, David, Dylan, Geert, Giles, Laura, Linda, Lieve, Louis, Jason, Johan, Julia, Tinus, Nancy, Nikki, Henri, Frank, Yaron, Youri, Kevin, Annie, Alvin, Alain, Ms, Ria, Luc, Jan, Eva, Marc, Anne, Bert, Rita, Dirk, Zeger, Dono, Jean, Jill, Eric, Erik, Emma, Iggy, Marie, Mario, Simon, Alice, Gary, and Sophie