Jón Ögmundsson or Ögmundarson (Latin: Ioannes Ögmundi filius; 1052–23 April 1121), also known as John of Hólar and St. Jón Ögmundarson or Ögmundsson (Icelandic: Jón helgi Ögmundarson/Ögmundsson), was an Icelandic Catholic bishop. In 1106, the second Icelandic diocese, Hólar, was created in the north of Iceland, and Jón was appointed its first bishop. He served as bishop there until his death. Influence. A religious purist, Jón made it his mission to uproot all remnants of paganism. This included changing the names of the days of the week.
https://en.wikipedia.org/wiki/J%C3%B3n_%C3%96gmundsson
Jón Ögmundsson or Ögmundarson (Latin: Ioannes Ögmundi filius; 1052–23 April 1121), also known as John of Hólar and St. Jón Ögmundarson or Ögmundsson (Icelandic: Jón helgi Ögmundarson/Ögmundsson), was an Icelandic Catholic bishop. In 1106, the second Icelandic diocese, Hólar, was created in the north of Iceland, and Jón was appointed its first bishop. He served as bishop there until his death. Influence. A religious purist, Jón made it his mission to uproot all remnants of paganism. This included changing the names of the days of the week.
