William King

(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: nickname from Middle English king, Old English cyning ‘king’ (originally merely a tribal leader, from Old English cyn(n) ‘tribe’, ‘race’ + the Germanic suffix -ing). The word was already used as a byname before the Norman Conquest, and the nickname was common in the Middle Ages, being used to refer to someone who conducted himself in a kingly manner, or one who had played the part of a king in a pageant, or one who had won the title in a tournament. In other cases it may actually have referred to someone who served in the king's household. The American surname has absorbed several European cognates and equivalents with the same meaning, for example German König (see Koenig), Swiss German Küng, French Leroy. It is also found as an Ashkenazic Jewish surname, of ornamental origin.