Vilhjálmsson is an Icelandic patronymic surname, meaning "son of Vilhjálmur." In the Icelandic naming system, surnames are not typically inherited; instead, Vilhjálmsson indicates that the bearer's father is named Vilhjálmur. The name is rooted in the same Germanic tradition as William, the related names that trace back to the Old High German elements willo (will, desire) and helm (helmet, protection). Notable Bearers Among prominent individuals with the surname Vilhjálmsson are: Einar Vilhjálmsson (born 1960), an Icelandic Olympic javelin thrower who participated in multiple Summer Games and set national records. Matthías Vilhjálmsson (born 1987), an Icelandic footballer (soccer player) who has played for various clubs and the Icelandic national team.