The name Brocken bow refers to the Brocken, a peak in the Harz mountains in Germany. It is used as a synonym for the terms glory and *Ulloa's bow, provided that the latter phenomenon is accompanied by a * Brocken spectre.
References
Lynch, D.K., Livingston, W. (1995). Color and light in nature. Cambridge: Cambridge University Press.
Dictionary of Hallucinations. J.D. Blom. 2010.