George Tupou I

Siaosi Tupou I (1797–1893), born Maeakafa, was a towering warrior of immense physical strength and tactical brilliance who unified the three rival island groups of Tongatapu, Ha'apai, and Vava'u by 1845. Converting to Christianity, he adopted the English name George after King George III.

In his 1862 Emancipation Edict, Tupou abolished the feudal serfdom that bound commoners to regional chiefs, granting land tenure to every Tongan male. On November 4, 1875, he granted the Constitution of Tonga, creating a constitutional monarchy with freedom of the press, religion, and legal equality, securing Western diplomatic recognition that protected Tonga from colonial annexation.