Simplify the following text for a Grade 11 native English-speaking person.
Original: Peeter Volkonski is a son of harpsichordist and composer prince Andrei Volkonsky , and a great-great-great-grand-son of His Serene Highness prince Pyotr Mikhailovich Volkonsky .
Simplified: Peeter Volkonski is a descendant of an aristocratic princely family , son of Prince Andrei Volkonsky . HSH Prince Pyotr Mikhailovich Volkonsky is a great-great-great-great-grandfather of Prince Peeter Volkonski .