Jaroslav Bohdan Antonovych Rudnyckyj (, ; November 18, 1910 – October 19, 1995) was a Ukrainian Canadian linguist and lexicographer with a specialty in etymology and onomastics, folklorist, bibliographer, travel writer, and publicist. He was one of the pioneers of Slavic Studies in Canada and one of the founding fathers of Canadian "Multiculturalism". In scholarship, he is best known for his incomplete two volume Etymological Dictionary of the Ukrainian Language (1962–82), his Ukrainian-German Dictionary (1943), and his extensive study of the term and name "Ukraine" (1951). Career Born in Przemyśl, Habsburg Galicia, in what is today eastern Poland near the border with Ukraine, he received his M.A. in Slavistics in 1934 and his PhD (under Witold Taszycki) in this same field in 1937 from the University of Lviv. From 1938 to 1940, he was Research Associate at the Ukrainian Scientific Institute in Berlin. From 1941 to 1945 he was a professor at the Ukrainian Free University in Prague and he taught at the University of Heidelberg from 1945 to 1948. In 1949 he emigrated to Canada where he organized and became head of the Department of Slavic Studies at the University of Manitoba. He stayed there until his retirement in 1976. With the historian, Dmytro Doroshenko and the literary scholar, Leonid Biletsky, he was a co-founder of the Canadian branch of the Ukrainian Free Academy of Sciences which is located in Winnipeg. He became the third president (1955–1970) and one of the most important scholars in this emigre institution which carried out a wide-ranging publication program during his presidency. After his retirement from the University of Manitoba, he moved to Montreal in eastern Canada from which he frequently commuted to Ottawa to work in the National Archives of Canada and teach at the University of Ottawa. Philologist His books include The Ukrainian Language and Its Dialects, in Ukrainian, (1937; 5th revised ed. 1978), a German-language textbook of Ukrainian (1940; 4th ed. 1964), A Modern Ukrainian Grammar for English speakers (1949; reprinted seven times), and a pioneering but incomplete English-language Etymological Dictionary of the Ukrainian Language (2 volumes in 22 fascicles, 1962–1982). He also produced several smaller Ukrainian language books on the origins of various Ukrainian placenames including Galicia, Volhynia, and, in most detail, Ukraine. As well, he wrote on Canadian, especially Manitoban, placenames of Ukrainian origin. During the Second World War, he published a short Ukrainian-German Dictionary which quickly went