Analysis of information sources in references of the Wikipedia article "Weisiger" in English language version.
German: probably a habitational name for someone from any of various places called Weissig, in Saxony, Brandenburg, Thuringia, and Silesia. Although the surname Weissig occurs in Germany, there is no record of the form Weis(s)iger.
Nachname Sauermann wird mindestens 670-mal in mindestens 18 Ländern benutzt.