The English-language exonyms Ruthenian, (Cyrillic transliteration: Rusyn) (, , Rusiny; , Rusyny/Rus'ki; , Rusin: Русины, Rusiny) is a historic name for Ukrainians. Particularly, in Poland Ukrainians were called as such until the World War II (see a map for Polish census below). Belorusians on the other hand were known as Litvins. The 16th century Muscovites did not consider themselves Ruthenians and proudly refer to themselves as Muscovites such as Ivan Fyodorov who was signing his works in Polish as Ioann Theodor Muscovite, typographer in Greek and Slavic.

The English-language exonyms Ruthenian, (Cyrillic transliteration: Rusyn) (, , Rusiny; , Rusyny/Rus'ki; , Rusin: Русины, Rusiny) is a historic name for Ukrainians. Particularly, in Poland Ukrainians were called as such until the World War II (see a map for Polish census below). Belorusians on the other hand were known as Litvins. The 16th century Muscovites did not consider themselves Ruthenians and proudly refer to themselves as Muscovites such as Ivan Fyodorov who was signing his works in Polish as Ioann Theodor Muscovite, typographer in Greek and Slavic.