The Rothschilds are really the Orsini bloodline.

They adopted new identities in order to conceal their true names, origins, and family backgrounds. The Orsinis, who hold a higher position of power compared to the Black and White popes, are particularly well-known for their individual referred to as the Grey pope. They changed their names to hide their identities, origins and bloodlines. The Orsinis are higher in power than the Black and White popes. He's known as the Grey pope.