The secular administrative dynasty of Tongan paramount chiefs, founded c. 1470 when the reigning Tuʻi Tonga delegated day-to-day political and military rule to his brother Moʻungāmotuʻa, leaving the Tuʻi Tonga as a primarily sacred/ceremonial title; the Tuʻi Haʻatakalaua line itself ceded effective power to a further cadet line, the Tuʻi Kanokupolu, from 1610 onward.
Declined through the 17th-18th centuries as the Tuʻi Kanokupolu line (created 1610) accumulated real power; the last Tuʻi Haʻatakalaua widely regarded as holding genuine authority, Maealiuaki, met Captain Cook in 1777 and died shortly after, and the title became effectively defunct/nominal by the close of the 18th century, though descendants continued to claim it (later folded into the Tungī noble line); dates run non-terminal-adjacent but are treated as ending c. 1799 pending a firmer scholarly date for final extinction of the title.
The atlas holds 2 border frames for Tuʻi Haʻatakalaua — the shape you scrub through changes in 1470 · 1610.
The standard scholarly single-volume history of Tonga; covers the Tuʻi Tonga/Tuʻi Haʻatakalaua/Tuʻi Kanokupolu succession of dynasties in detail — no monograph exists specifically on the Haʻatakalaua title alone, so this is the closest polity-specific source (a Tonga-specific history, not a broad Pacific survey). Verified via Open Library (search: title:"Island Kingdom" author:Campbell).