Prior to the advent of the late Rajah in 1838, Sarawak appears to have attracted no attention, except that Gonsavo Pereira, who made the second Portuguese visit to Bruni in 1530, says that Lave (Mempawa), Tanjapura (which cannot be identified), and Cerava (Sarawak) were the principal ports, and contained many wealthy merchants; and Valentyn relates that in 1609 the Dutch found that Calca (Kalaka), Saribas, and Melanugo had fallen away from Borneo (Bruni) and placed themselves under the power of the king of Johore.[63] Melanugo is also difficult to identify, but it may be that a transcriptive error has crept in somewhere, and that it refers to the Malanau districts beyond Kalaka.[64] The Sarawak Malays claim their origin from the ancient Kingdom of Menangkabau in Sumatra. Fifteen generations back, one Datu Undi, whose title was Rajah Jarom, a prince of the royal house of Menangkabau, emigrated with his people to Borneo, and settled on the Sarawak river. This prince had seven children, the eldest being a daughter, the Datu Permisuri.[65] She married a royal prince of Java (this was after the downfall of Majapahit), and from them in a direct line came the Datu Patinggi Ali, of whom more will be noticed in the sequel, and the lineage is now represented by his grandson, the present Datu Bandar of Sarawak. The Datu Permisuri remained in Sarawak. Rajah Jarom's eldest son established himself in the Saribas; his third son in the Samarahan; the fourth in the Rejang;[66] and the fifth up the right-hand branch of the Sarawak, from whence his people spread into the Sadong. These settlements increased within their original limits, but were not extended beyond the Rejang. Beyond this the Malays of Sarawak know little; but that these settlements must have early succumbed to the rising power of Bruni is evident. But it is also evident that after that power had commenced to wane, its hold over Sarawak gradually weakened until it became merely nominal. In 1609, the year they established themselves at Sambas, the Dutch found that these districts had fallen away from Bruni, as we have noticed. There may have been, and probably were, spasmodic assertions of authority on the part of Bruni, but it seems fairly evident that the Sarawak Malays managed to maintain an independence more or less complete for many years, up to within a very short period of the late Rajah's arrival, and then they had placed themselves again under the sovereignty of the Sultan, only to be almost immediately driven into rebellion by Pangiran Makota, the Sultan's first and last governor of Sarawak.