George Tupou I, King of Tonga (c. 1797 – 18 February 1893), was originally known as Tāufaʻāhau 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-ʻaione), meaning iron cable.
George Tupou I was born around 1797 in Tonga. 4 December is often-quoted as his birthday and is a public holiday in Tonga; however, it was the date of his coronation in 1845 as Tuʻi Kanokupolu, when he took the name Tupou. Tongoleleka and the Niuʻui hospital there (which was destroyed in the 2006 Tonga earthquake) are often stated as his birthplace; however, no evidence supporting this is available, and Lifuka and Tongatapu are also often stated as the birthplace. His father was Tupouto'aʻ, who aspired to be the 17th Tuʻi Kanokupolu, but he was not recognized as such by the high chiefs of Tongatapu, as he was viewed as a low ranking usurper from Haʻapai. His mother, Hoamofaleono, felt her life was at risk on Tongatapu, so she fled with her son to Haʻapai, probably within the year of his birth. Her history, as well as her son Maeakafa's history, is more reliably tracked to Haʻapai Island.