Oslica was attested in written sources as Ozlitz in 1291 and as Osslizi in 1584. The origin of the name Oslica is uncertain, but is likely derived from the common noun osel 'donkey' (or from the surname Osel derived from that noun). A less likely possibility, argued against by medieval transcriptions, is that the name is derived from the plant name oselica 'pepper-saxifrage'. The toponym Oselica has the same etymology.[4]