The name "Bencubbin" comes from the Aboriginal word for "place of the snakes" and is now applied to the rock to the north of the town. The aboriginal word is generally spelt "Gnylbencubbing" and is not the rock known as Mount Marshall. Mount Marshall is south-east of Bencubbin, whereas the rock known as Gnylbencubbing is at the northern edge of the township. Mount Marshall is named after Captain Marshall MacDermott, who was the first manager of the Western Australian branch of the Bank of Australasia. These two rocks and Wiacubbing Hill are three of the largest outcrops around Bencubbin.