Some of the poems are not even Oriental; "Annikas Freier," p. 217, for example, is from the Finnic.
"The Influence of India and Persia on the Poetry of Germany" by Arthur F. J. Remy
Professor Schiefner gives a Finnic variation of the same story.
"Zoological Mythology, Volume I (of 2)" by Angelo de Gubernatis
Ukko, the Finnic thunder-god, i.
"Zoological Mythology (Volume II)" by Angelo de Gubernatis