Sonya 's original name was Sonya Rizvi but was re-christened with the last name Jehan to honor her grandmother , Noor Jehan , who is a legendary singer and Lollywood actress . Jehan 's original name was Sonya Rizvi but she changed her last name to Jehan in honor of her grandmother , Noor Jehan , a legendary singer and actress in British India and Pakistan .