The Finnish version "Velisurmaaja" ["The Fratricide"] is mentioned in this article: "Finnish Folk Songs in Minnesota", by Marjorie Edgar. The Finnish text with English translation is in Archer Taylor, "Edward" and "Sven i Rosengard" (Univ. of Chicago Press, 1931, p. 61). Jean Sibelius arranged the song in Six Finnish Folksongs (1903).
~Masato