Saera Targaryen may be related to Hugh Hammer on 'House of the Dragon' — here's what to know about the estranged princess

• Hugh the blacksmith makes a claim about his Targaryen parentage in "House of the Dragon."
• His description of his mother will sound familiar if you've read "Fire and Blood."
• Here's what to know about Saera, an estranged Targaryen princess.

Warning: Major spoilers ahead for season two, episode seven of "House of the Dragon," and "Fire and Blood."