(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.
English (chiefly southwestern England and South Wales): occupational name for a fuller, from an agent derivative of Middle English tuck(en) ‘to full cloth’ (Old English tūcian ‘to torment’). This was the term used for the process in the Middle Ages in southwestern England, and the surname is more common there than elsewhere. Compare Fuller and Walker.
Americanized form of Jewish To(c)ker (see Tokarz).
Irish: Anglicized form of Gaelic Ó Tuachair ‘descendant of Tuachar’, a personal name composed of the elements tuath ‘people’ + car ‘dear’, ‘beloved’.
Possibly also an Americanized form of German Tucher, from an occupational name for a cloth maker or merchant, from an agent derivative of Middle High German tuoch ‘cloth’.