William Clark

(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: occupational name for a scribe or secretary, originally a member of a minor religious order who undertook such duties. The word clerc denoted a member of a religious order, from Old English cler(e)c ‘priest’, reinforced by Old French clerc. Both are from Late Latin clericus, from Greek klērikos, a derivative of klēros ‘inheritance’, ‘legacy’, with reference to the priestly tribe of Levites (see Levy) ‘whose inheritance was the Lord’. In medieval Christian Europe, clergy in minor orders were permitted to marry and so found families; thus the surname could become established. In the Middle Ages it was virtually only members of religious orders who learned to read and write, so that the term clerk came to denote any literate man.