Olomouc.

Inherited from Old Czech Olomúc. The name of the city appears in Chronica Boëmorum (finished 1125) by Cosmas of Prague, where it is named Olomuc, Olomuz and Olomucz, all the versions being probably pronounced /olomuːt͡s/. Its origin remains unclear. There is only an acceptable theory related to the second part of the name -mouc, which is from Old Czech -múc, which is probably from Proto-Slavic *-mǫt (“noise, muddle”) + possessive suffix *-jь, which assimilated together into -c. This suggests that there might have been a personal name *Olomút (or *Olomǫt), with Olomúc meaning "the property of Olomút", similarly to the names of villages Bolelouc (which used to mean "a property of Boleľút") or Chořelice (originally called Chořelúc, which used to mean "a property of Chořeľút"). However, there is no evidence of any real occurrence of the name Olomút. There is no accepted theory related to the origin of the first part Olo-. Proto-Slavic *olъ (“beer”) does not seem to make much sense as its origin, although there was an attempt to explain the supposed personal name as a name of an unknown divine creature, meaning "the one who lets the beer ferment". Some linguists also tried to relate the name of the city to the Germanic personal names Alamud or Aulomont.