The subject matter of the article are surnames which appeared in the Wedding Registry as
well as in the documentary-historical chronicle of Kleck region. The gathered data show the
diversity of etymological sources of anthroponyms with the prevalance of Belorusian linguistic
elements. The surnames have typical Belorussian phonetic, word-formative, and semantic
elements such as tsyekannye (Cimawiec), dzyekannye (Gordziejczyk), akannye (Makowczuk –
Makawczuk), yakannye (Jaluga), changing initial [w] into [u] (Ulasień, Ulasiuk). As a result of
mutual intertwining of cultures there appeared surnames of different origins such as Polish
(Nawrocki), Ukrainian (Kowalczuk), Russian (Popow), Baltic (Bajgus) and Jewish (Mazja).
