William Pepper

(male) Probably the most successful of all the Old French names of Germanic origin that were introduced to England by the Normans. It is derived from Germanic wil ‘will, desire’ + helm ‘helmet, protection’. The fact that it was borne by the Conqueror himself does not seem to have inhibited its favour with the ‘conquered’ population: in the first century after the Conquest it was the commonest male name of all, and not only among the Normans. In the later Middle Ages it was overtaken by John, but continued to run second to that name until the 20th century, when the picture became more fragmented.

English and North German: from Middle English peper, piper, Middle Low German peper ‘pepper’, hence a metonymic occupational name for a spicer; alternatively, it may be a nickname for a small man (as if the size of a peppercorn) or one with a fiery temper, or for a dark-haired person (from the color of a peppercorn) or anecdotal for someone who paid a peppercorn rent.