Tu'i Ha'atakalaua

The Tuʻi Haʻatakalaua was a dynasty of Tongan kings, which originated in the 15th century by taking over the power from the Tuʻi Tonga line. Lost the power in the 16th century to the Tuʻi Kanokupolu dynasty, and disappeared into nothingness by the end of the 18th century.

4 out of the current 33 hereditary noble titles in Tonga trace their authority from the Tuʻi Haʻatakalaua. These are: Tungī, Luani, Fotofili and Fakafānua. Collectively they are known as the Fāaʻi hai (those four). The traditional burial grounds of the Tuʻi Haʻatakalaua in Lapaha are: Fale pulemālō, Fale fakauō, Fale tuingapapai (or tuipapai), Fale loloʻamanu (nowadays split up into (Fale) Loʻāmanu and Tauhakeleva). These 5 are considered to be traditional langi although not named so, as the real langi are for the Tuʻi Tonga only.

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Wikipedia