Family name Sillien (Sillien 
) , around the world, is a very rare last name. The cognomen Sillien is characteristic of Belgium, where it is a rare surname, France, where it is a very rare surname, and the United States, where it is an extremely rare surname. Very seldom, Sillien is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Sillien | Canada, France, Brazil, United States, Belgium |
| jean-luc sillien French politician, FR (b. 1957) |
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| alice sillien Righteous Among the Nations, BE |
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| fernand sillien Righteous Among the Nations, BE |
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| marie sillien Righteous Among the Nations, BE |
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Suzy, Chantal, Corinne, Pauline, Richard, Laurent, Nicolas, Vanessa, Vincent, Quentin, Matthieu, Samantha, Siltanne, Geoffrey, Jean-Luc, Isabelle, Mickael, Margaux, Jerome, Lynsey, Anne, Rose, Gene, Jean, Marly, Annie, Cindy, Anne-Lise, Kenny, Erica, Marine, Matteo, Michel, Alicia, Arthur, Coraly, Jules, and Jean-Claude