1 Answers
"The Two Kings' Children" is a German fairy tale collected by the Brothers Grimm in Grimm's Fairy Tales, tale number 113.
It is Aarne-Thompson type 313C, the girl helps the hero flee, and type 884, the forgotten fiancée. Others of the first type include "The Master Maid", "The Water Nixie", "Nix Nought Nothing", "Jean, the Soldier, and Eulalie, the Devil's Daughter", and "Foundling-Bird". Others of the second type include "The Twelve Huntsmen", "The True Bride", and "Sweetheart Roland".
The Brothers Grimm also noted that the scene with the false bride resembles that of "The Singing, Soaring Lark". Other fairy tales that use a similar motif include "East of the Sun and West of the Moon", "Black Bull of Norroway", "The Feather of Finist the Falcon", "Mr Simigdáli", and "White-Bear-King-Valemon".