Roko Tui Bau

Turaga na Roko Tui Bau is a vassal chief to the Vunivalu of Bau, Paramount Chief of the post Cakobau government divisional categorization of enclaves rearing Kubuna Confederacy.
From his seat at the chiefly residence of Naicobocobo, the "Roko Tui Bau" is Suzerain of the Vusaratu chiefs which include the "Roko Tui Viwa, Roko Tui Kiuva, Tui Nuku" and has special relationships with the related titles of "Roko Tui Dreketi, Ratu Mai Verata, Roko Tui Namata, Roko Tui Veikau, Tui Vuya" and many other chiefly titles in Fiji's Chiefly Households.
The succession to the title does not follow primogeniture, but the candidate must be a high-ranking member of the Vusaratu clan. Although the Roko Tui Bau is technically a subordinate chief, the selection process is completely independent of the "Vunivalu" and his Tui Kaba clan.
Status.
The Vunivalu was not always the senior Chieftain in Kubuna and Bau. The title was considered subordinate to the Roko Tui Bau. Power struggles to gain power resulted in Vunivalu Tanoa Visawaqa expedition to the interior (Naitasiri) of Vitilevu (1600-1700) only to be captured and held hostage only to be released by Veremi of Wainikelei in Moala whose people now occupy the highlands of Sera, Ra, Naitasiri, Vugalei. The linage is said to be from the eldest Son of the Ratu mai Vereta that presumed dead on maiden voyage beaching at Qaliqali in Moala whose clan knew themselves as Wainikelei, through Kapaiwai Mara, who advised councillors of Bau at the time to seek Wainikelei help after the eighth conquest from Namosi failed His son Seru Epenisa Cakobau was not born and raised at Moala by his grandparents from Nukulau and their Votua kin who took Tanoas priced wife as his token of appreciation (vakacirisalusalu) to the General that freed him from Nadaravakawau, but used his acquired knowledge to subvert the Lasakau people to plot and execute the overthrow of the ruling group, led by Ratu Ravulo Vakayaliyalo, in 1837; Seru Epenisa Cakobau then reinstated his father's legacy through his quest with the help of British colonizing compatriots.
Origins in folklore.
According to legend, the Fijians originated from Tanganyika in Africa.
The arrival of Tura (landed at Naicobocobo, Bua), his eldest son Lutunasobasoba (landed at Vuda) and Degei & siblings (landed at the Rakiraki coast) 
When this immigrant arrived in Fiji. There were people already occupied the land.
Among those who already occupied Fiji was a long line of genealogy, (who were descended of Koya Na Sau,the eldest son of Tui Waicala-na-vanua #1's 11 children) which The first Roko Tui Bau derived from. He was known as Ratu Vueti, the son of Ratu Vaula, the son of Ratu Vula(or Ra-Vula)from Moturiki and his mother was Buisavulu (Lutunasobasoba's eldest daughter).
Ratu Vueti was given a sacred stone by the chiefs of Fiji at Nakauvadra after he had defeated the undefeated twin sons of Ratu Waicalanavanua #2 at Narauyaba plain below Nakauvadra mountains. People mis-interprated Ratu Waicalanavanua who fathered the Ciri brothers(16th century AD) with Tui Waicalanavanua #1(BC era nd progenitor of the first Fijians after the great flood) whom Ratu mai Bula(Chief of Life-God Himself) rescued from Vuniivilevu (original Burotu/Pulotu paradise) before the flood. Since the Tongan mythology said that Vahano'a (open sea), Lagi (heavens) and Pulotu (Spiritual Fijian paradise) all existed from the beginning. Which has its own Spiritual Guardian Cherub who normal shows up in dark nights to illuminate the way for local boat captains in and around the whole seafield at Vuniivilevu or Davetalevu (now known as the Bau Waters or Waisiliva)..And Vuniivilevu was also known in the Fijian mythology that it was the garden of God where Tamanaivi (our first parents) were casted out from, by Ratu mai Bula (God Himself) for eating the forbidden fruit which He commanded to be offered to him 1st, before anyone else eat it. It still has its ancient abodes, long line of big water jars, a few walls, a big gate, contour terrain in its underwater. Compared to the spiritual Burotu, the one which they later found floated a few times at the Matuku waters, which hasn't provided its spiritual guardian or signs of civilization in its underwater.
Back to our main progenitor, Tui Waicalanavanua #1 who was also known as Lutudra#1 or Catanatamani #1. Whom Ratu mai Bula rescued from Vuniivilevus' old earth nd flew him up to the above firmanent (Navukailagi) by the way of a stone glass made casket(iloilovatu). Then God stored him up there while the flood was on earth. Right after the flood, God flew him back to earth nd put him back on the diminished allotment right next to the dissolved (pre-flood) landmass. That's how that island was named mo Tu riki (verb) nd two other names on that island were Naturuku (noun of Moturiki) and Navukamai (to commemorate that mysterious transportation from the above firmanent back to earth after the flood). Also where the name "Vueti" was taken from, to commemorate that mysterious rescued on Tui Waicala-na-vanua #1 by God Himself on that part of the preflood earth, we know now as Vuniivilevu. 
After the Nakauvadra war, Ratu Vueti left via Nakorotubu where he had his first (1st) born child, a son, the original "Gonesau" or 'child with supernatural power', called Nadurucoko who was born through supernatural circumstances with a woman from Suva in Bureiwai, Nakorotubu.
Nadurucoko the original "Gonesau", was the father of Nailatikau Nabuinivuaka, the first (1st) Vunivalu of Bau and Kubuna.
When Ratu Vueti reached Moturiki he came back to Bau island, he ordered for a sacred temple to be built and buried the sacred stone (tawake kei Viti) at the foundation mound and named the temple as Vatanitawake translated as 'the shelter or shelve of the signifying authority award/flag of Fiji'.
The "Moturiki" group were direct lineal descendants of "Ratu Vueti's" three sons. They became the three Tokatoka of "Vuaniivi, Nacokadi" and "Nadruguca" and comprised the Mataqali Vusaratu and were the first to settle at Kubuna. Ratu Vueti was buried at Kubuna in a mound called Tabukasivi, and was deified and became the ancestral god of the people of Kubuna, they worshiped him in the form of a serpent. After his death a division arose over the installation of a successor to Vueti. Eventually a new Roko Tui Bau, Ratu Serumataidrau (one of Rt Vueti's son), was selected from the Vuaniivi, which was the senior line.
Those that went to "Moala" travelled considerably more and were led by lineal descendants of "Roko Nadurucoko" and therefore claimed collateral descent from "Ratu Vueti". They dispersed to Totoya and even to Tonga. Some returned and they gathered once again first at Verata then at "Nayavu" (second time). From there they split, one group left Nayavu to settle at "Kaba" peninsula, they took the name "Tui Kaba". The second group called the "Vunivalu" continued travelling first to "Viria", before ending up at "Ovea".
All groups acknowledged the Roko Tui Bau as paramount but due to their separation, they were quite independent as well. At some point, the Roko Tui Bau settled on the island called "Ulunivuaka" that was already home to the "Butoni" and "Levuka" people The island was renamed Bau in honour of the "Roko Tui Bau". The "Vusaratu" and the "Tui Kaba", together with their warriors of the "Vusaradave" were the first to settle the island, the "Butoni" were expelled to resettle at "Namacu" in Koro. The "Levuka" remained and served as fisherfolk and navy, moving to the hill on the center of the island to leave the more desirable spots to their social betters.
In 1760, legend has it that the Vunivalu people found that the "Levuka" were keeping the choicest seafood and deepsea fish for themselves and presenting smaller specimens for the Sevu or tribute. In retaliation, Nailatikau, chief of the Tokatoka "Vunivalu" promptly expelled the "Butoni" (who eventually settled at Lakeba). In the same move, he took the additional name "Nadurucoko" established himself as the first Vunivalu of Bau or secular chief, reunifying the two groups that had originally split at Moala and aggregating to himself the title of "Tui Kaba", much to the chagrin of the latter as they were the senior line of "Nadurucoko I".
Nailatikau was succeeded by Banuve, who in the 30 years as Vunivalu, reclaimed wide areas of the adjacent reef flats and built up stone docks and sea walls. He allowed new fisherfolk from Beqa and Kadavu to settle on the island and establish the villages of "Lasakau" and "Soso". Those of Lasakau were the core of the new Bauan navy.