 Ungku has also written more than 50 books and monographs on social and economic problems of Malaysia, consultant to UN specialized organizations ILO, UNESCO, UN Economic Commission for Asia and the Far East).Abdul Aziz is a cousin of Syed Muhammad Naquib al-Attas and Syed Hussein Alatas as well as Sultan Ibrahim of Johor on his father's side.His father was of Malay and Circassian descent, while his mother was English.