[1] With his father's death in 1283, Alv Erlingsson inherited Sarpsborg and served as governor of Borgarsyssel which today makes up the county of Østfold.

Alv Erlingsson had a central role in Norwegian national governance following the death of King Magnus VI in 1280.

The first construction of Akershus Fortress was started around the late 1290s by King Haakon V in response to earlier attack on Oslo by Alv Erlingsson.

[4] Alv Erlingsson plays an important role in the early parts of Sigrid Undset's The Master of Hestviken series, based on the writer's research in historical sources.

Audunsson is depicted as speaking of him with boundless admiration: "(...) I was a happy man the day I met with Earl Alf - when I took the oath to him on the hilt, I almost thought I had come home.(...)

Small he is, and low - I am a head taller, I wis - and broad as the door of a house, shaggy and brown and curly haired; ay, the Tornberg race comes of a King's daughter and a bear, they say.