As seen in House of the Dragon, House Velaryon is next to House Targaryen in the hierarchy of the Blacks' camp. The Velaryons boast Valyrian descent, just like Targaryens, and their lineage can be traced back to an ancient bilateral kinship descent. Aegon Targaryen wed his heir, Prince Aenys Targaryen, to the daughter of the then Lord of the Tides, Aethan Velaryon. Aenys and Alyssa Velaryon went on to have six children, including the Old King Jaehaerys I.