The Nuttall Encyclopedia
King of Norway from 1223 to 1263; was defeated by Alexander III. of Scotland at Largs, and died at the Orkneys on his way home.
Wood, James, ed. Entry for 'Haco V.'. The Nuttall Encyclopedia. https://www.studylight.org/encyclopedias/eng/nut/h/haco-v.html. Frederick Warne & Co Ltd. London. 1900.