Asa
Mother of Halfdan the Black who secured his inheritance by returning to Agder.
Asa is a historical figure in the Norwegian royal tradition, attested in the Heimskringla as the mother of Halfdan the Black. After her husband's death, Asa took the young Halfdan westward to Agder, the district her father Harald had governed, and established herself in that kingdom (Heimskringla, The Chronicle Of The Kings Of Norway, 1. Halfdan Fights With Gandalf And Sigtryg). Her decisive action in relocating to her father's territory secured both her position and her son's upbringing in a region where the family held established authority.
The Heimskringla records that "his mother Asa set off immediately with him westwards to Agder, and set herself there in the kingdom which her father Harald had possessed" (Heimskringla, The Chronicle Of The Kings Of Norway, 1. Halfdan Fights With Gandalf And Sigtryg). The emphasis on immediacy suggests either danger or strategic urgency, and the phrasing "set herself there in the kingdom" implies Asa took an active governing role rather than merely retreating to family lands. Snorri presents her as an agent in her own right, not simply a vessel for Halfdan's lineage.
On trail: Genealogies