[2] Their ethnonym, variously transcribed as Butchulla, Batjala, Badjala and other variations, has been etymologised as signifying "sea folk", though Norman Tindale suggested that the word better lends itself to an analysis as combining ba ("no") with the suffix tjala, meaning "tongue".
[3] K'gari's abundance of fish resources made it rank, with the Kaiadilt homeland of Bentinck Island, as one of the two most densely populated areas on the Australian continent.
[11] The peoples of K'gari were generally classified into three distinct units: Ngulungbara, Butchulla and Dulingbara, each composed of several clan groups, and, altogether, making up 19 subgroups.
[13] Matthew Flinders was the first white person to land on the island, at Bool Creek on Sandy Cape in July 1802 and made short contact with the Ngulungbara horde.
Within three decades (1879), their numbers had dropped to around 300–400, a collapse attributed by an informant of the then Chief Commissioner of Brisbane to shootings by the Australian native police, and the effects of venereal disease and alcohol introduced by white people.