William Wallace

(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 and northern Irish: from Anglo-Norman French waleis ‘Welsh’ (from a Germanic cognate of Old English wealh ‘foreign’), hence an ethnic name for a Welsh speaker. In some cases this clearly denoted an incomer to Scotland from Wales or the Welsh Marches, but it may also have denoted a Welsh-speaking Scot: in western Scotland around Glasgow, the Welsh-speaking Strathclyde Britons survived well into the Middle Ages.