Аннотация:The article deals with the classification problem of onym units designating realia of Tomsk and Tomsk region. The authors offer structural classification of endemic units included in the corpus of Tomsk realionyms. The classification contains six classes of realionyms with basic structural schemes. As these schemes get more complicated, every class includes different number of levels, each of them containing from one to eight structural types of Tomsk realionyms. Structural classification is intended to meet the needs of translational parallelization of endemic clusters in order to simplify understanding of nomination mechanisms acting within definite historical and cultural environment.