Russian variants include the Frog Princess or Tsarevna Frog (Царевна Лягушка, Tsarevna Lyagushka) and also Vasilisa the Wise (Василиса Премудрая, Vasilisa Premudraya); Alexander Afanasyev collected variants in his Narodnye russkie skazki. Andrew Lang included an Italian variant titled The Frog in The Violet Fairy Book. Italo Calvino included another Italian variant from Piedmont, The Prince Who Married a Frog, in Italian Folktales, where he noted that the tale was common throughout Europe. Georgios A. Megas included a Greek variant, The Enchanted Lake, in Folktales of Greece.
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