Cognomen Jean-Gérard (Jean-Gérard 
) , across the world, is an extremely rare surname. Much more frequently, Jean-Gérard 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 Gérard.
Muzi, Beauregard, Nicollier, Rodrigues, Petitprez, Batailler, Cailleaux, Quero-Berlioux, Loescher, Didierre, Delannoy, Pailloncy, Bernabeu, Favreau, Labarre, Grohens, Debadts, Ploteau, Pacoret, Cauchon, Acciméus, Anfossi, Sullice, Forget, Dorzin, Pernin, Bilvin, Benoit, Moreau, Barus, Piscitelli, and Braunschweig-Dubost