Maelor Targaryen

"'I am the second born son of my family, my glory and merits had to be earned. They were not given. I did not inherit the Iron throne nor Dragonstone, so I had to get the Stepstone for myself and my descendants' - Maelor to his son Aemond"

Maelor Targaryen is the second son of King Rhaegar I Targaryen and his spouse Olenna. This makes Maelor the brother of King Aenar I Targaryen and for a while he was the second in line to be King of the Seven Kingdoms. However as the succesion was reasurre by the birth of Maelor's many male nephews, sons of his brother AenarI and his sister Queen Helaena, he was allowed to found House Targaryen of the Stepstones as a cadet branch after he was sent to secure the Stepstones for the crown (given in exchange a lordship over the area).

He married lady Maegelle Whitefyre with whom he had two sons, Maekar Targaryen of the Stepstones and Aemond Targaryen of the Stepstones. Maegelle also suffered from a miscarriage, a stillborn daughter and a little daughter who died in the craddle of sudden baby death.

As it's tradition among members of House Targaryen, he had a dragon egg placed on his craddle that hatched to become the Dragon Euraxes, a marvellous female dragon beast of white scales. Euraxes latter had three clutches of eggs from which most of the Targaryen of the Stepstone's dragons were born.