Tonga: Heads of State: 1875-2019 ʻi he Kelesi ʻa e ʻOtua ko e Tuʻi ʻo e Puleʻanga ʻo Tonga = By the Grace of God, King of the Kingdom of Tonga 4 Nov 1875 - 18 Feb 1893 Siaosi Tupou I = George Tupou I (Maeʻakafa Ngininginiofolanga Tāufaʻāhau Tupou) [1] 18 Feb 1893 - 5 Apr 1918 Siaosi Tupou II = George Tupou II (Siaosi Tāufaʻāhau Tupou) 5 Apr 1918 - 16 Dec 1965 Sālote Tupou III = Salote Tupou III (Sālote Mafileʻo Pilolevu Veiongo Tupou) [2] 16 Dec 1965 - 11 Sep 2006 Tāufaʻāhau Tupou IV = Taufaʻahau Tupou IV (Siaosi Tāufaʻāhau Tupoulahi Tupou) [3] 11 Sep 2006 - 18 Mar 2012 Siaosi Tupou V = George Tupou V (Siaosi Tāufaʻāhau Manumataʻongo Tukuʻaho Tupou) 18 Mar 2012 - Tupou VI (ʻAhoʻeitu ʻUnuakiʻotonga Tukuʻaho) [1] Original name: Maeʻakafa Ngininginiofolanga; later Tāufaʻāhau added; Siaosi = George from 7 Aug 1831; becomes Tuʻi Kanokupolu and acquires clan name Tupou 4 Dec 1845. [2] Tuʻi informally replaced by Kuini for a female ruler. [3] 10 Sep 2006 at place of death (New Zealand). Last updated on: 22 Mar 2012 13:30:26