The research object of the present text refers to the Ukrainian and the Belorussian masculine proper names (and their variants) derived from the Roman mythological names. The aim is to present their full list and their initial meaning as well. The researched anthroponyms are divided into three groups according to: 1) the type of the appellative used as a basis during the derivation process; 2) the model used for anthroponyms coined from a Latin name; 3) the canonization by the Catholic church, the Orthodox one, or by both of them.