With the precision we can rely on from the Germans, the Comma is called the C-falter, the C butterfly. In France it is known as Robert-le-Diable, Robert the devil, which, according to a 2017 article in the Guardian newspaper, ‘is also the name of a favourite 19th-century Centifolia rose with a unique purple-cerise-scarlet-grey flower and a wonderful old rose fragrance; an 1831 opera by Giacomo Meyerbeer about the moral redemption of the son of a mortal and a demon; and the father of William the Conqueror, who was said to be the son of the Devil.’ Why the Comma also bears this name the Guardian writer does not specify. Here in Wales the Comma is appropriately named Adain garpiog, which translates as raggedy wing.