Joske's Thumb is a precipitous volcanic plug that rises on the horizon to the west of Suva, Fiji.
Sir Edmund Hillary was defeated in his first attempts to climb the peak.
The peak gets its name from Mr Adolph Brewster Brewster, who had later changed his name to Joske's. The Brewster family were noted for their pioneering work in establishing the sugar industry, including the importation of machinery for Fiji's first sugar mill.
Joske's Thumb takes its name from Paul Joske, one of the pioneers who, with Brewer, established Suva's first sugar mill. This ultimately failed, owing to the poor crop from shallow soil. Later, Paul Joske devoted much of his time to laying out and establishing the new capital. His son was Adolf Brewster Joske, who later changed his name to Adolf Brewster Brewster.