Something I have asked the present Aboriginal corporation managing Gnoorganbin (Moreton) is why the name was changed from Gnoorganbin to Mulgumpin, as I have always known the traditional name as Gnoorganbin.
No reply yet, but it's only been 6 months or so.
Below are extracts from an 1880s issue of 'The Geographical History of Queensland'.
Note the original spelling of Morton. The present use of an 'E' was a typo.
Morton Island as " Gnoorganbin." Several tribes and
three dialects were found on Stradbroke. Morton Island possessed
one tribe with a dialect distinct from all others, a remarkable ethnological fact.
Re: K'gari.
No mention of the word! Funnily enough too, the tribe mentioned below are not the tribe that apparently use the term 'K'gari'.
On 26th July, 1802, Flinders landed on bandy Cape, and had a
friendly interview with the natives, whom he described as "fine men."
They were a tribe called "Doondoora "; the island was "Moonbi" and
Talboor "; and Sandy Cape, " Carree."
Perhaps the truth will never be known. Anyway, "What's in a name"?