king of Hawaii from 1825 to 1854, brother of Kamehameha II.

Only 10 years of age when he succeeded to the throne, he was initially under the regency of Kamehameha I's favourite wife, Kaahumanu, who had been regent ever since Kamehameha II had visited England in 1824 and died there. Converted to Christianity in 1824, she became known for her wise and beneficent rule. On her death in 1832 the regency fell to Kamehameha I's daughter Kinau, but in the following year Kamehameha III assumed power in his own right.

After hearing a series of lectures on government delivered by an American clergyman, William Richards (Richards, William), Kamehameha III promulgated the Declaration of Rights, called Hawaii's Magna Carta, on June 7, 1839, the Edict of Toleration on June 17, 1839, and the first constitution on Oct. 8, 1840. This first written constitution for Hawaii contained several innovations, including a representative body of legislators elected by the people. It also set up a supreme court. The first compilation of laws was published in 1842. With Richards' aid, Kamehameha also obtained diplomatic recognition of Hawaiian independence by the United States (1842) and by Great Britain and France (1843).