Complex sentence: Raja Pratap Singh was also known as Pratapsinha, the Raja was the nominal Chhatrapati (emperor) and heir to his ancestor Shivaji, founder of the Maratha empire.
Split into simpler sentences: Raja Pratap Singh was also known as Pratapsinha. The Raja was the nominal Chhatrapati (emperor) and heir to his ancestor Shivaji, founder of the Maratha empire.