Surname Jean-Sebastien (Jean-Sebastien 
) , in all the world, is a very rare family name. The family name Jean-Sebastien is habitual in Hungary, where it is a very rare surname, France, and Canada. Much more prevalently, Jean-Sebastien is the forename as well as the last name. Parts of the name also exists independently as a first name Jean, and a first name Sebastien.
| VARIANT | COUNTRY |
|---|---|
| Jean-Sebastien | Canada, France, New Zealand, United States, Belgium |
Cyr, Leroux, Vallee, Fleury, Fortin, Mathieu, Michaud, Clement, Boucher, Poirier, Richard, Giguere, Lessard, Leclerc, Leblanc, Ouellet, Bergeron, Bouchard, Langlois, Levesque, Lefebvre, Tremblay, Lavoie, Landry, Girard, Gagnon, Roy, Cote, Dion, Guay, Gros, Noel, Morin, Caron, Blais, Bleau, Fontaine, Denis, Houle, Martin, Moreau, Savard, Simard, Picard, Plante, Robert, Demers, Dubois, Gagne, and Boudreault