William Coleman

(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.

Irish: Anglicized form of Gaelic Ó Colmáin ‘descendant of Colmán’. This was the name of an Irish missionary to Europe, generally known as St. Columban (c.540–615), who founded the monastery of Bobbio in northern Italy in 614. With his companion St. Gall, he enjoyed a considerable cult throughout central Europe, so that forms of his name were adopted as personal names in Italian (Columbano), French (Colombain), Czech (Kollman), and Hungarian (Kálmán). From all of these surnames are derived. In Irish and English, the name of this saint is identical with diminutives of the name of the 6th-century missionary known in English as St. Columba (521–97), who converted the Picts to Christianity, and who was known in Scandinavian languages as Kalman.