KislyRussian, Belarusian Derived from Russian кислый (kisly) meaning "acid, acidic, sour".
RasconSpanish Possibly a nickname for Rascón, meaning “sharp”, “sour”, or “rail (the bird)”
SauerweinGerman Occupational nickname for someone who sold sour wine, or perhaps a nickname for someone with a sour disposition, from Middle High German sur "sour" + win "wine", i.e. vinegar.
SuhrGerman Nickname for a bitter or cantankerous person, from Middle Low German sūr meaning "sour".