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