Despite his name, Geralt does not come from Rivia: he grew up in the witchers' keep of Kaer Morhen in the realm of Kaedwen. In the interest of appearing more trustworthy to potential clients, young witchers were encouraged to make up surnames for themselves by master Vesemir. As his first choice, Geralt chose "Geralt Roger Eric du Haute-Bellegarde", but this choice was dismissed by Vesemir as silly and pretentious, so "Geralt" was all that remained, this name was chosen by Visenna (his mother). "Of Rivia" was a more practical alternative, and Geralt even went so far as to adopt a Rivian accent to appear more authentic.