EtymologyKošar is a Croatian occupational surname derived from the word koš, meaning "basket". The name originally denoted a person who made or sold baskets, reflecting a common practice in medieval Europe where surnames were often based on one's trade.Geographic DistributionAccording to Forebears, Košar is most prevalent in Croatia and Serbia. It is relatively rare in other countries. The name may also originate in Slovenia, from the Slovene word koš (basket).Related SurnamesThe surname is closely related to Košir, a Slovene form which also derives from the same root meaning "basket". Both surnames are part of a broader group of Slavic surnames based on the word for basket.