The purpose of this article is to present the characteristics of a group of anthroponyms in order to point out some directions for studies of Brazilian anthroponymy. This article is based on theoretical assumptions of Onomastics and on the interface between this field of study and Law. The anthroponyms analyzed are civil name, social name, ballot name and parliamentary name. Data were collected from the Superior Electoral Court, the Chamber of Deputies and court decisions from tribunals. Recent Brazilian anthroponymy studies demonstrate that research on personal names relating linguistic and legal aspects is still incipient. This article provides some suggestions that could bridge such a gap by analyzing lexical or grammatical aspects of data originating from legal norms or judicial decisions.