Before his death, he was presumably thought to be the successor to the throne of Kedah, since the Raja Muda (Crown Prince) who his elder half-brother, Tunku Abdul Malik was considered incapacitated due to old age, and then the subsequent successors will follow his lineage. Due to his death, his descendants has been by-passed and since 16 December 2016, his younger brother, Tunku Sallehuddin was proclaimed the next heir and Raja Muda of Kedah.