George Tupou I, King of Tonga (4 December 1797 – 18 February 1893) was originally known as Taufa?ahau I, or Tupou Maeakafa Ngininginiofolanga in modern spelling (originally Tubou Maeakafa Giniginiofolaga).
He adopted the name Siaosi (originally Jiaoji), the Tongan version of George, after King George III of the United Kingdom, when he was baptized in 1831.
His nickname was Lopa-ukamea (or Lopa-?aione), meaning iron cable.