Gunnhildr konungamóðir or Gunnhildr Gormsdóttir, whose name is often Anglicised as Gunnhild, is a quasi-historical figure who appears in the Icelandic Sagas, according to which she was the wife of Eric Bloodaxe. From Wikipedia
The series will explore the rise of Erik Bloodaxe and Gunnhild, Mother of Kings, in a tumultuous fight for Norway's throne.