Tunku Zain Al-'Abidin ibni Tuanku Muhriz, more popularly known as Tunku 'Abidin Muhriz, is the second son of the reigning Yang di-Pertuan Besar of Negeri Sembilan in Malaysia, Tuanku Muhriz ibni Almarhum Tuanku Munawir and the reigning Tunku Ampuan Besar of Negeri Sembilan, Tuanku Aishah Rohani binti Tengku Besar Mahmud. Wikipedia