ENThe aim of the paper is to find out the parallels of eponymic terms in Latvian and Lithuanian branches of the humanities. The sources are defining dictionaries of philosophy, literature, music, religion, linguistics, history terms. In the study of eponymic terms of Latvian and Lithuanian humanities, attention is paid to terms and research related to the terminologization of eponyms; trends in term coining in the Baltic language are examined. Two structures of eponymic terms are common in terminology: 1) one-word terms coined using direct and affixal apellativization; 2) compound terms with eponyms in the dependent component. Eponymic terms are coined from: 1) anthroponyms (names, surnames, pseudonyms), often also from theonyms; 2) toponyms (macrotoponyms, oikonyms, hydronyms, oronyms); 3) ergonyms (names of human associations, organizations, as well as publications and works of art). The semantics of eponymous terms in the humanities is diverse: political and ideological movements, philosophical trends, teachings, schools, religious organizations and their members, styles of artistic activity, in terminology of history – privileges, collections of rights and contracts, battles, etc. Sometimes the same eponym gives rise to several terms of the same or different branches. In order to name multifaceted, mainly historical concepts, both anthroponyms (first names and surnames) and toponyms (names of cities or rivers) are combined using a hyphen. Keywords: eponyms, onomastics, eponymic terms, terminology, Latvian language, Lithuanian language.