EN
In the presented study, we focus on the basic characteristics of the anthroponymic communication register to which names of social network users belong as well. We point to the elemental difference between an individual’s nicknames (which is also a result of social relations) and names in the virtual cybernetic space – in other words, the difference between a name of a participant in chat communication and a name in social networks. Based on the comparison of these various name forms, we point to the basic characteristics of anthroponyms of social networks, i.e. a hybrid structure situated on the borderline of first names, surnames, hypocoristic forms of anthroponyms, and nicknames with a distinct aspect of autonomination. In the study, we deal with the formal structure of social network anthroponyms as well.