Thestius.

 Thestius (Θέστιος) was a character in Greek legends. He was known as the king of Pleuronians in Aetolia. His parents were Ares and Demonice.

Leda and Althea were Thestius daughters.

There are myths and legends about this hero.

Source of image:

https://www.istockphoto.com/es/vector/mitolog%C3%ADa-griega-leda-y-el-cisne-gm688559852-126686507

Source of image:

https://www.istockphoto.com/es/vector/estatua-de-leda-y-el-cisne-de-bartolomeo-ammanati-gm1283330943-380781779

Source of image:

https://www.istockphoto.com/es/vector/bocetos-y-dibujos-de-leonardo-leda-y-el-detalle-del-peinado-de-cisne-gm656148840-119428325

Leda.

 Leda (Λήδα) was a character of Greek myths and legends. Her father was Thestius, king of Pleuronians in Aetolia. Her mother was Deidameia.

Leda married king Tyndareus of Sparta. She had several children: beautiful Helen, Clytemnestra, Castor and Pollux, Timandra, Phoebe and Philonoe. 

There are many paintings and sculptures and Leda.

Source of image:

https://www.shutterstock.com/es/image-photo/croatia-zagreb-7-may-2017-stamp-637486831

Source of image:

https://www.shutterstock.com/es/image-photo/russia-kaliningrad-19-april-2017-stamp-644669500

Source of image:

https://www.shutterstock.com/es/image-photo/queen-sparta-leda-preparing-date-swan-1710059170

Source of image:

https://www.shutterstock.com/es/image-photo/leda-swan-by-bartolomeo-amannatti-bargello-35636869

Source of image:

https://www.shutterstock.com/es/image-photo/turin-piedmont-italy-may-16-2012-1309272766