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Hi assalam..

melalui perniagaan .....pedagang 2 arab..

The efforts of the Brunei Sultans in spreading Islam helped to spread Islam ..The second sultan, Sultan Ahmad, was the first to name 'Brunei' from the word 'Barunah'. Darussalam, Arabic terms for Abode of Peace, was added in the 15th century by the third sultan, Sharif Ali, to emphasise Islam as state religion, and to enhance itsspread.