Cognomen Gerno (Gerno 
) , in all the world, is a rare surname. The cognomen Gerno is habitual in France, where it is a rare surname, Israel, where it is a very rare surname, and Philippines, where it is an extremely rare surname. More frequently, Gerno is the forename as well as the last name.
Neto, Eksteen, Hallam, Visser, Fetter, Welzel, Stalter, Altmann, Kessler, Reinard, Gissing, Hornung, Wandtke, Weigelt, Silveira, Schneider, Prießnitz, Rosendaal, Rozendaal, Grapengeter, Tönjes, Nakoutouzolo, Junior, Damasi, Eltz, Enck, Mandt, Silva, Allen, Couto, Kugel, Kwaks, Prado, Grave, Loots, Noble, Fritz, Opper, Scherf, Coffee, Kriech, Deysel, Deuner, Laffin, and Nascimento