The SultanThe Queen Abdul Mateen ibni Hassanal Bolkiah (Jawi: عبد المتين; born 10 August 1991)[1] is a member of the royal family of Brunei.

He is the tenth child and fourth son of Sultan Hassanal Bolkiah of Brunei, by his former second wife, Yang Mulia Datin Paduka Seri Puan Hajah Mariam binti Haji Abdul Aziz.

[6] Since young, Prince Mateen had a keen interest in military matters and has actively engaged in and attended a number of military-related events.

[7][8] On 15 April 2011, Prince Mateen graduated from the Sovereign's Parade Commissioning Course 102 as an officer cadet of the Royal Military Academy Sandhurst,[1] United Kingdom and promoted to the rank of Second Lieutenant.

[1] Following leaders' bilateral meetings in Amman on 4 October 2018, which saw the signing of three memorandum of understanding in the areas of infrastructure, tourism, and defense in addition to a customs cooperation agreement, Brunei and Jordan reaffirmed their longstanding alliance.

[16] Later on 19 October, alongside his father, he attended the 12th Asia–Europe Meeting (ASEM) in Brussels, where Brunei demanded that talks to get back up a Free Trade Agreement (FTA) between the European Union (EU) and ASEAN.

[20] From 13 to 14 March 2023, Prince Mateen took part in a comprehensive tour of the Coronado, California-based Naval Special Warfare (NSW) commands.

He met with members of NSW and Rear Admiral Keith B. Davids, chief of Navy Special Warfare Command, to talk about potential areas of future cooperation.

[26] On 7 April 2007, the AM Gunners captained by Abdul Mateen ended in a 1–1 draw against team Projek Ikan Pusu (PIP) during a Charity football match.

[28] Prince Mateen and Anisha Rosnah binti Adam's royal wedding was declared on Sultan Hassanal Bolkiah's orders.

[31] President Joko Widodo, President Bongbong Marcos and Liza Araneta Marcos, Al-Sultan Abdullah and Tunku Azizah, King Jigme Khesar Namgyel Wangchuck and Queen Jetsun Pema, Prime Minister Lee Hsien Loong and Ho Ching, Prime Minister Anwar Ibrahim and Wan Azizah were among the special guests at the royal wedding reception on the 14th January 2024.