Globally, Jean Sebastien (Jean Sebastien 
) is a rare male forename. The first name Jean Sebastien is habitual in France, where it is a rare boy's name, Belgium, and Canada, where it is a very rare boy's name. Very seldom, Jean Sebastien is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Jean Sebastien | Belgium, Spain, France, Eswatini, Canada |
Seb, Wonner, Marteau, Chastre, Berneyron, Boucher, Raymond, Ricardo, Gilbert, Lambert, Leblanc, Thommen, Tissier, Tupinier, Humbert, Borderie, Brassard, Philippe, Tremblay, Trottier, Fournier, Zounamon, Hubert, Nelson, Loisel, Dupuis, Bru, Roy, Gex, Miot, Cote, Riou, Naud, Merle, Busé, Blais, Crescence, Guyot, Laude, Jolie, Houle, Faure, Bordas, Romain, Richer, Durand, Dumazy, Dumont, Grond, and Gautheron