Willim is of German origin, meaning "resolute protection" or "strong-willed." It is derived from the Germanic elements "wil" meaning will or desire, and "helm" signifying helmet or protection. The name was popularized in England during the Middle Ages but has since become less common.
The name Willim experienced fluctuations in popularity throughout the 20th century. Between 1915 and 1988, there were a total of 262 babies named Willim. The years with the highest number of births were 1934 (12 births) and 1968 (10 births), while the most consistent period for this name was between 1950 and 1973, with an average of 6 to 7 births per year. However, there were also several years with only a single-digit number of births or no recorded births at all, indicating that Willim was not one of the more popular names during this period.