Helen of Troy refuge with Leda. The swan gained her affection, and the two mated. Leda then produced an egg, from which Helen emerged. The First Vatican Mythographer introduces the notion that two eggs came from the union: one containing Castor and Pollux; one with Helen and Clytemnestra. Nevertheless, the same author earlier states that Helen, Castor and Pollux were produced from a single egg. Pseudo-Apollodorus states that Leda had intercourse with both Zeus and Tyndareus the night she conceived Helen. On the other hand, in the "Cypria", part of the Epic Cycle, Helen was the daughter of Zeus and the goddess Nemesis.
Helen of Troy connected this etymology to a hypothetical Proto-Indo-European sun goddess, noting her name's connection to the word for "sun" in various Indo-European cultures. In particular, her marriage myth may be connected to a broader indo-European "marriage drama" of the sun goddess, and she is related to the divine twins, just as many of these goddesses are. None of the etymological sources appear to support the existence, save as a coincidence only, of a connection between the name of Helen and the name by which the classical Greeks commonly described themselves, namely "Hellenes", after Hellen (; ) the mythological progenitor of the