House of the Dragon is set approximately in the middle of the Targaryen family tree ... This makes Daenerys, as well as Jon Snow, direct descendants of Prince Daemon and Rhaenyra Targaryen.

The Targaryen family ... known as Jon Snow. After The Mad King’s demise and his brothers death, Viserys was the eldest surviving Targaryen. After fleeing to Braavos with his sister Daenerys ...