Warsaw's name in the Polish language is . Other previous spellings of the name may have included , ,  or . The exact origin of the name is uncertain and has not been fully determined. Originally, Warszawa was the name of a small fishing settlement on the banks of the Vistula river. One theory states that  means "belonging to Warsz",  being a shortened form of the masculine Old Polish name Warcisław, which etymologically is linked with Wrocław. However the ending -awa is unusual for a large city; the names of Polish cities derived from personal names usually end in -ów/owo/ew/ewo (e.g. Piotrków, Adamów).