Geisz orgin is german Geiß (Geiss), which means goat. ;-)
http://www.geiss.info/geiss.jpghttp://www.bio-suisse.ch/media/sprachfrei/bildarchiv/tierhal...german phonebook 2168 hits:
http://www.dastelefonbuch.de/but you also find 14 hits for Geisz!!! no idea but maybe germans who came back from Hungary at WW2....
159. Margaretha Geis * 7-Jan-1727, Tscherwenka, Batschka, YU, + ??-___-????.
http://www.moser-deutschland.eu/m_moser.htm