The aim of the work is to develop a comparative analysis of personality’s rights of legal entities in Germany, Portugal and Brazil, considering its relevance through an examination of the legal micro-systems of constitutional source. To this end, we discuss the main aspects of the matter in each of the countries selected in order to present relevant information to the elaboration of a comparative overview with the purpose of highlighting the acceptance doctrine, the similarities between the systems and pointing out the different treatment of the subject in those countries. The intention to prepare a comparative analysis is justified by the understanding that comparative law is of great importance for the development of national law, to the understanding of foreign legal systems and to identify sources of inspiration regarding constitutional changes.