Anyone got a source for that being the Malbank/Malbon coat of arms? Granted it is the only decent result in a Google image search, but it bears no relation to any known Malbon coat of arms and is certainly not the one of the earliest barons (that I know of).
I've added more information at the Malbon project, as well as a few versions of the original coat of arms:
https://www.geni.com/projects/Malbon-Family/43242
I've updated Philip Malbank with a simple shield version.