The barracks were bordered to the east by Shelbourne Road, which used to be the western bank of the River Dodder.
[1] The earliest specific mention is a 1573 reference to "the wood called Beggars boush".
[2] Neil Howlett notes earlier instances of "Beggars Bush" as a minor placename in England, usually denoting poor-quality farmland.
[2] The idea that it denoted a meeting place for beggars or a thieves' den is rejected by Howlett as a folk etymology originating in Brewer's Dictionary of Phrase and Fable.
[3] It was also occupied by the Beggars Bush Barracks from 1827 until 1929 but is now the home of the Irish Labour History Society Museum,[3] National Print Museum, and the former home of the Labour Relations Commission and the Geological Survey of Ireland.