What is the history of Glenbrook
Glenbrook (163m)
The origin of this name goes back to 1818 when Sir John Jamison, while exploring the Nepean and Warragamba Rivers, named a tributary Glen Brook (now Glenbrook Creek). When the railway was built across the Blue Mountains the location became known as Watertank, a stopping place for the steam engines to draw water from the nearby lagoon.
When a crossing loop was established here in 1874 (for trains to pass on the single line) the name was changed to Wascoe’s Siding and later still, with the addition of a passenger platform in 1878, to Brookdale. The name Glenbrook was given in 1879 and the Village of Glenbrook was proclaimed in 1885.
More info here: https://www.askroz.com.au/blog/origin-of-blue-mountains-town-names/