Source Unknown

A quote (from Robert Hughes' The Fatal Shore):

Bennelong Point, where the Sydney Opera House now stands, was first named Limeburners' Point by the colonists because it was mantled in a deposit of mollusc shells, built up over thousands of years of uninterrupted gorging.

A footnote (from the same source):

Bennelong was an Iora tribesman, the first black to learn English, drink rum, wear clothes and eat the invaders' strange food. He was rewarded for his curiosity with the friendship of Governor Phillip - and a small brick hut, about 12 feet square, in which he lived on the end of what is now Bennelong Point. "Love and war," a colonial diarist noted, "were his favourite pursuits." He went to England with Phillip in 1792 and was much feted as an exotic Noble Savage, the first native Australian to be seen in London. But he lost most of his curiosity value after a year or two, and it was not until the end of 1795 that he returned to Sydney, with the newly appointed governor, John Hunter. By then he fitted neither his old tribal world nor the carceral microcosm of the whites, whose tolerance of the blacks had begun to disintegrate after Phillip's departure. Bennelong became increasingly sodden and pugnacious with rum, and died at the age of about 40 in 1813.

More detail (care of the Australian Electoral Commision's Origins of Electoral Division Names website):

Bennelong NSW Aboriginal man befriended by Governor Phillip in 1789.

An observation (source unknown):

Bennelong is our Prime Minister's electoral division.