That's absurd. Women don't mean it's a new family, it's just a new House.
Saying that the British Royal Family isn't an unbroken line because of female inheritance is absurd. The BRF traces it's claim to William the Conqueror. Queen Elizabeth II is the direct descendant of William the Conqueror.
The Spanish house of Bourbon has a direct paternal line going back to the Middle Ages, specifically to Hugh Capet . Queen Isabel II didn't break the line since her husband was also a patrilineal Bourbon. Unfortunately, Leonor will break the line unless she also marries another member of the dynasty.
I believe the Belgian Coburgs may also have a direct paternal line going back to the medieval house of Wettin in Saxony. Again, however, with the decision to switch to equal primogeniture, the line will probably be broken by Elisabeth's descendants even though it will continue to exist if princes Gabriel, Emmanuel, Aymeric or Nicolas have male issue.
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