Dôn

Dôn is an ancestor figure in Welsh legend and literature. She is typically given as the mother of a group known as the "Children of Dôn", including Gwydion, Arianrhod, and Gilfaethwy, among many others. However, antiquarians of the early modern era generally considered Dôn a male figure.

The House of Dôn

In addition, Bonedd yr Arwyr gives an extended list of children, including Aidden, Cynan, Digant, Elawg, Elestron, Eunydd, Hedd, Hunawg, and Idwal.

In astronomy

Llys Dôn is the traditional Welsh name for the constellation Cassiopeia. At least two of Dôn's children also have astronomical associations: Caer Gwydion is the traditional Welsh name for the Milky Way, and Caer Arianrhod being the constellation of Corona Borealis.

Etymology & Proto-Indo-European Origins

Dôn has different etymological origins than the Irish Danu; while the latter is perhaps a water goddess, Dôn more likely comes from ghdhonos, meaning "the earth."
In this sense, she can be seen as the Welsh version of "dheghom" from Proto-Indo-European mythology, the primordial Earth Goddess from which all other gods originate. It has been suggested that, as a result, the Children of Dôn would be cognate to the Greek Titans.