According to Swedish historian Adolf Schück he was probably the same person as Håkan the Red and was called the Blót Swain (a swain who was willing to perform the blót) as an epithet rather than a personal name.
Ifølge den svenske historiker Adolf Schück så var Blot Sven sandsynligvis den same person som Håkan Røde, og blev kaldt Blot Swain (en swain der var villig til at udføre blot) som et tilnavn frem for et personligt navn.