The story
- Proto-Slavic · derived from*kosъ
- English todayKosak
* As a Polish, Lower Sorbian (Kósak), Czech and Slovak surname, variant of Kós, surname meaning "blackbird," from Proto-Slavic *kosъ, and Kosa, meaning "scythe." The Sorbian forms are sometimes Germanized as Kossack or in some cases Kozak. * Also as a Czech surname, from košák (“beehive”), itself formed from koš (“basket”). * As a Slovene surname, from koščak (“kind of nut tree”), probably from kost (“bone”). Compare Koschak. * As a Serbo-Croatian surname, from košak (“basket”). Compare Kosack.
Etymology from Wiktionary, CC BY-SA 4.0.