Dioscuri, Castor and Pollux, sons of Zeus
and Leda, and brothers of Helen
(of Troy) and Clytemnestra. One version of the legend says that there were
two pairs of twins: Pollux and Helen (children of Zeus) and Castor
and Clytemnestra (children of Tyndareus, Leda's husband). The children
emerged from two eggs, which Leda laid after Zeus had coupled with her
in the form of a swan. Dioscuri had many adventures, one of them is the
abduction of their cousins, daughters of their uncle Leukyppos, Phoebe
and Hilaera. The girls were betrothed, and Castor and Pollux were invited
to the wedding feast. They liked their cousins so much that carried them
away and married them themselves.
See: Peter Paul Rubens Castor
and Pollux Abduct the Daughters of Leukyppos.