Notes on Brant Steil. The illegitimate child of Lyanna Baratheon and Rhaegar Targaryen. A servant of the lover’s knew that if Robert found out about the child, he would slaughter it , to ensure his rule. Before sending the infant off the servant pinned a ruby broach, which had been Rhaegar’s, to her. Then under the darkness of night, left the baby in front of the King’s Landing.