(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.
Short forms: Will, Bill.
Pet forms: Willy, Willie, Billy.
Cognates: Irish: Uilliam. Scottish Gaelic: Uilleam. Welsh: Gwilym. German: Wilhelm. Dutch: Willem. Scandinavian: Vilhelm. French: Guillaume. Spanish: Guilermo. Catalan: Guillem. Portuguese: Guilherme. Italian: Guglielmo. Czech: Vilém. Slovenian: Viljem. Hungarian: Vilmos. Lithuanian: Vilhelmas. Latvian: Vilhelms.
German, Dutch, Jewish (from the Netherlands), Danish, and Swedish: 1. ethnic name for someone from Friesland. The name of this region is ancient and of uncertain origin; the most plausible speculation derives it from an Indo-European root prei- ‘to cut’, with reference to the dikes necessary for the cultivation of low-lying land. There is archaeological evidence of the construction of ditches and dams along the southern shores of the North Sea from at least the time of Christ. 2. occupational name for a builder of dams and dikes. The word was used in this sense in various parts of Germany during the Middle Ages, and is probably a transferred use of the ethnic term, dike building being a characteristic occupation of Frieslanders. 3. diminutive of Friedrich.