John Forrest's discoveries were not so much important lands or major rivers, but his explorations were still important as they opened up areas of Western Australia about which little had been previously known.
In 1869, Forrest led the search for Ludwig Leichhardt's expedition which had gone missing while travelling across Australia from east to west. This search was unsuccessful, but it gave Forrest the chance to do what he wished, which was to explore the uncharted areas of Western Australia.
In 1870, Forrest surveyed the route which Edward Eyre had taken in 1840-41 from Adelaide to Albany, across the Great Australian Bight. As the main route from eastern Australia overland to the west, he realised it needed to be surveyed so a road could be built, and later a railway.
John Forrest didn't discover Australia. (Nor did Captain Cook, a commonly believed myth.) John Forrest was an Australian explorer from Western Australia. He also became the first Premier of Western Australia. For details on who actually discovered Australia, see the related question.
Forrest Sr. was introduced to Forrest Jr. at Jenny's apartment in Savannah, Georgia.
No
William Forrest Andrews, known as Steve Forrest, was not a descendant of Nathan Bedford Forrest or his brothers. He was actually the great-grandson of Nathan Bedford Forrest's brother, John. The family connection comes through the lineage of John Forrest rather than Nathan himself.
The possessive form of the proper noun Forrest is Forrest's.example: Forrest's report card made his mother smile.
Forrest Seabury's birth name is Seabury, Sumner Forrest.
Forrest Sherman's birth name is Sherman, Forrest Percival.
Forrest Tucker's birth name is Forrest Meredith Tucker.
Forrest Wilson's birth name is Robert Forrest Wilson.
Forrest Wood's birth name is Wood, Forrest Benjamin.
Forrest Pruett's birth name is Forrest Wayne Pruett.
Forrest Burns's birth name is Forrest G. Burns.