Brunei (/bruːˈnaɪ/ , broo-NYE), officially the Nation of Brunei, the Abode of Peace (Malay: Negara Brunei Darussalam, Jawi: نڬارا بروني دارالسلام ‎), is a sovereign state located on the north coast of the island of Borneo in Southeast Asia.slam is the official religion of Brunei, specifically that of the Sunni branch, as dictated by the Mudabh of Shafi'i. Two-thirds of the population, including the majority of Bruneian Malays and Bruneian Chinese, adhere to Islam.