William Harvey

(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 Scottish: from the Breton personal name Aeruiu or Haerviu, composed of the elements haer ‘battle’, ‘carnage’+ vy ‘worthy’, which was brought to England by Breton followers of William the Conqueror, for the most part in the Gallicized form Hervé. (The change from -er- to -ar- was a normal development in Middle English and Old French.) Reaney believes that the surname is also occasionally from a Norman personal name, Old German Herewig, composed of the Germanic elements hari, heri ‘army’ + wīg ‘war’.