(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.
Irish: Anglicized form of Gaelic Ó Ciardha, a midland family name meaning ‘descendant of Ciardha’, a personal name derived from ciar ‘dark’, ‘black’.
Irish: Anglicized form of Gaelic Mac Fhiachra ‘son of Fiachra’.
English: habitational name from Carey in Devon or Cary in Somerset, named for the rivers on which they stand; both river names probably derive from the Celtic root car- ‘love’, ‘liking’, perhaps with the meaning ‘pleasant stream’.
English (of Norman origin): habitational name from the manor of Carrey, near Lisieux, Normandy, France, of uncertain origin.
Welsh and Cornish: variant of Carew.
Possibly an Americanized form of German Gehrig or Gehring.