William Moody

(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 Irish: nickname for a courageous, arrogant, or foolhardy person, or one quickly moved to anger, from Middle English modie ‘impetuous’, ‘haughty’, ‘angry’ (Old English mōdig ‘brave’, ‘proud’, from mōd ‘spirit’, ‘mind’, ‘courage’). This English name has been established in Ireland since the late 13th century.