From Wiktionary, the free dictionary
From red + Ukrainian; see red (“communist”).
Red Ukrainian (plural Red Ukrainians)
- (chiefly Canada) A Communist Ukrainian or person of Ukrainian ethnicity.
1950, Seymour Martin Lipset, Agrarian Socialism: The Cooperative Commonwealth Federation in Saskatchewan, page 170:The so-called Red Ukrainians, who ideologically support the Soviet Union, are mostly agnostics and atheists.