From the Germanic name Willahelm, which was composed of the elements wil " will, desire" and helm "helmet, protection". Saint William of Gellone was an. All about the name William: Meaning, origin, and popularity of William. What does William mean? Click for more information about the name William and. Region of origin, England, Wales, Cornwall, France. Language(s) of origin, [[ English, Norman language|English, Norman]]. Related names, William, Willimon, Williman, Williamson, Wilhelm. Footnotes: Frequency Comparisons. Williams is a patronymic form of the name William that originated in medieval England and Region of origin : England, Wales, Cornwall , Fr.