ABSTRACT : The title of “Pengiran” was mentioned in sixteenth century European records and was written on local tombs dating to the same period. The “Silsilah Raja-raja Brunei”, which is the genealogy of Brunei rulers, shows that ranking within “Pengiran” had already existed since the reign of Sultan Muhammad Hassan, 1582-1598. Simultaneously, there also occurred other branches of the Brunei nobles from the reigns of other Sultans of Brunei. This paper – using the qualitative approach, historical method, and literature review – demonstrates that there was a restructuring to the ranking of Brunei nobles during the reign of Sultan Haji Omar Ali Saifuddien III, 1950-1967, specifically between 1958 and 1959. The restructuring, which occurred on the eve and following the promulgation of the 1959 Constitution, was indirectly influenced by the role of Sultan Hashim Jalilul Alam Aqamaddin, 1885-1906, in the 1905/1906 Supplementary Agreement. Sultan Hashim only wanted the descendants from him to be the future Sultans of Brunei which in turn, in 1959, distinguished nobles of Sultan Hashim descendants to nobles of non-Sultan Hashim’s descendants. Another factor is the growing numbers of “Pengiran” from the nineteenth century. However, the “Pengiran Kebanyakan” proved to have no clear definition largely, because it was a product of the restructuring. This was also because the restructuring had tried to simplify the noble ranking, which was categorically wider and complex in the past. KEY WORDS: Brunei Nobles; Genealogy of Brunei Rulers; Restructuring. About the Authors: Awangku Muhammad Nabeel bin Pengiran Haji Kamarul Zaman is a Ph.D. Student at the Department of Historical Studies FASS UBD (Faculty of Arts and Social Sciences, University of Brunei Darussalam). Dr. Nani Suryani binti Haji Abu Bakar and Assoc. Prof. Dr. Haji Awang Asbol bin Haji Mail are the Lecturers at the Department of Historical Studies FASS UBD in Bandar Seri Begawan, Brunei Darussalam. E-mail address: asbol.mail@ubd.edu.bn and nani.bakar@ubd.edu.bn Suggested Citation: Zaman, Awangku Muhammad Nabeel bin Pengiran Haji Kamarul, Nani Suryani binti Haji Abu Bakar & Haji Awang Asbol bin Haji Mail. (2021). “A Brief History of Brunei Noble Rank between 1958 and 1959: A Restructuring” in TAWARIKH: Journal of Historical Studies , Volume 12(2), April, pp.159-178. Bandung, Indonesia: Minda Masagi Suci and ASPENSI, with ISSN 2085-0980 (print) and ISSN 2685-2284 (online). A rticle Timeline : Accepted (February 24, 2021); Revised (March 24, 2021); and Published (April 30, 2021).