Kosmach
Kosmach is a surname of Ukrainian origin. It is relatively uncommon and may be found primarily in regions with historical ties to Ukraine. The name likely derives from a personal characteristic or occupation of an ancestor, although the specific etymology remains somewhat uncertain. Some possible origins include connections to the word "kosmach" referring to a shaggy or disheveled person, or alternatively, it could be related to a place name or geographical feature. Further research into Ukrainian genealogical records would be required to determine the precise origin and meaning of the name in any specific family history.