The former Raja Perempuan bore him 4 children:
- HRH Tengku Muhammad Faris Petra
- HRH Tengku Muhammad Faiz Petra
- HRH Tengku Muhammad Fakhry Petra
- HRH Tengku Amalin A'Ishah Putri
Sultan Ismail Petra second marriage with Elia Suhana Ahmad, whom he married on 31 December 2007.
It was reported that the Sultan of Kelantan, Tuanku Ismail Petra Tuanku Yahya Petra, has filed an application for verification of his divorce from his second wife, Che Puan Elia Suhana Ahmad, at the Syariah High Court on 9 March 2010.
Since his stroke attack on 14 May 2009, there had been major concerns over his ability to continue serving as Sultan. After several trips to seek medical treatment in Singapore, eventually, Ismail Petra was succeeded by his son, Crown Prince Muhammad Faris Petra on 13 September 2010 by order of the Kelantan Succession Council.
Sultan Ismail Petra was born on November 11, 1949 in Kota Bharu, Kelantan. He is a son of Sultan Yahya Petra and Almarhum Raja Perempuan Zainab I
Sultan Ismail's early education was at Sultan Ismail College, Kota Bharu and later on through special teacher at the Kota Bharu palace.