Named after Hardeggasse, which honours three brothers who fought at Aspern in 1809.
The street was named on 23 March 1909 after three brothers of the noble Hardegg family who distinguished themselves at the Battle of Aspern in 1809: Johann Ignaz (1772–1848) and Johann Heinrich (1778–1854), both cavalry generals, and Johann Anton (1773–1825), a lieutenant field marshal.