ENThe article is dedicated to the literary creation of a forgotten Polish and Belarusian poet Jan Kozakovich (Litvin). The poet lived at the end of 16th and the beginning of 17th century in Vilna, wrote in Polish, but in his works he is an active patriot of the Grand Duchy of Lithuania. The poet’s epigrams and dedication can be found in a number of books published in the late 16th – early 17th century. However, Kozakovich’s most significant work is a poem “Walnut” (Vilna 1603) – an elegy of Ovid’s “The Walnut Tree”, remade in freestyle. Key words: multilingual poetry, the Grand Duchy of Lithuania, Renaissance, tradition, patriotism.