A post office called "Holbrook" was established in 1883, and remained in operation until 1915.   The community has the name of Charles Holbrook, original owner of the station.  A variant name was "Topaz Junction". 
- U.S. Geological Survey Geographic Names Information System: Holbrook Junction
- U.S. Geological Survey Geographic Names Information System: Holbrook Post Office (historical)
- "Post Offices". Jim Forte Postal History. Retrieved 9 April 2018.
- Federal Writers' Project (1941). Origin of Place Names: Nevada (PDF). W.P.A. p. 19.
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