William Stewart

(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: originally an occupational name for an administrative official of an estate, from Middle English stiward, Old English stigweard, stīweard, a compound of stig ‘house(hold)’ + weard ‘guardian’. In Old English times this title was used of an officer controlling the domestic affairs of a household, especially of the royal household; after the Conquest it was also used more widely as the native equivalent of Seneschal for the steward of a manor or manager of an estate.