Eivor is the first name of Assassin's Creed Valhalla protagonist Eivor Varinsdottir. The character is a Viking raider who leaves Norway with allies and helps establish a settlement in ninth-century England.
Valhalla allows the player to choose Eivor's presentation as male or female, but the character's given name remains Eivor. The game uses the surname Varinsdottir in its narrative, reflecting the Norse naming convention meaning daughter of Varin; the male presentation is also associated with the name Varinson in some contexts. This customization is why descriptions of Eivor can differ while referring to the same protagonist.
Sigurd is Eivor's adopted brother and a major story character. Basim is a Hidden One encountered in England, and Ragnar is a historical Viking name connected to the setting. None of those names is the player character's first name.