William Archibald

(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.

Scottish: from a Scottish personal name, Archibald, of Anglo-Norman French and (ultimately) Continental Germanic origin (see Archambault). In the Highlands of Scotland it was taken as an Anglicized equivalent of the Gaelic personal name Gille Easbaig ‘servant of the bishop’ (see Gillespie), probably because of the approximate phonetic similarity between Arch(i)bald and easbaig. Both Archibald and Gillespie are personal names much favored among Clan Campbell.