Wschodniosłowiańskie cechy językowe w antroponimii unitów zamieszkujących obwód białostocki w 1810 roku

The subject of this article is two anthroponymic categories, i.e. names and surnames identifying the Uniates living in the Białystok district in 1810. The analyzed personal names were shaped in the Polish - Ruthenian political, national-religious and socio-cultural borderland, where settlers from Ruthenia played a key role in the past. In the context of the religious affiliation of people bearing the researched names and surnames, the circumstances of the establishment of the Uniate Church, derived from the tradition of the Orthodox Church, were an important factor. All these reasons determined the presence of East Slavic language features in the analyzed resource on various levels: phonetic, semantic, morphological and structural. In terms of naming, the distinguished features resulted from the adaptation of the names from the Orthodox calendar to the East Slavic language systems. The Ruthenian genesis of surnames is confirmed by the appellative and nominative bases, as well as surname formants related to East Slavic languages