[1] Andrew Lang included a variant, The Sunchild, in The Grey Fairy Book, without listing any source information.
When Maroula is twelve, a fine gentlemen meets her while she is gathering herbs and tells her to remind her mother of her promise.
In Lang's variant, her mother stops up the house to keep all sunlight out, but she leaves open a key hole, and when the light falls on Letiko, she vanishes.
In Lang's, she is sent after straw; she sits in the shed and laments being taken from her mother; when she returns, she claims her shoes were too large and slowed her, so the Sunball shrinks them.
Then he asked two hares in Lang's version and two deer in Megas's, and they would eat grass and drink from streams.
[3] After folklorist Hans-Jörg Uther's 2004 revision of the index, the type was renamed ATU 898, "The Daughter of the Sun".
[5] Commenting on a Sicilian variant collected by Laura Gonzenbach, scholar Jack Zipes supposed that the tale originated in Middle East.
[8] Lang's original source was Vom Sonnenkinde ("About the Sun-Child"), collected from Epiros by Austrian consul Johann Georg von Hahn.
The second part of the tale follows the episode of the princess holding a vigil on a cursed prince, a slave replacing her, and the heroine confessing her story to an object named "stone of patience".