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King Harthacnut I. Sigurdsson, Of Denmark

King Harthacnut I. Sigurdsson, Of Denmark

Male 814 - 884  (70 years)

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  • Name Harthacnut I. Sigurdsson 
    Prefix King 
    Suffix Of Denmark 
    Birth 814  Jutland, Denmark Find all individuals with events at this location 
    Address:
    Hord 
    Gender Male 
    _AMTID 192683831190:1030:204653251 
    _COLOR 25 
    _FSFTID L2RQ-6PC 
    _UID 9AFF7F5052E6EC118E6FACDE480011229F59 
    Death 884  Jellinge, Vejle, Denmark Find all individuals with events at this location 
    Person ID I177632  World of Hyde
    Last Modified 29 Mar 2025 

    Father Sigurd 'Snake-In-The-Eye', Ragnarsson,   b. 777, Denmark Find all individuals with events at this locationd. 873, Northumberland, England Find all individuals with events at this location (Age 96 years) 
    Mother Blaeja Heluna Ællasdottir,   b. Abt 784, Weobley Castle, Worcester, England Find all individuals with events at this locationd. Between Abt 850 and 875, Jelling, Tørrild, Vejle, Denmark Find all individuals with events at this location (Age ~ 66 years) 
    Family ID F61078  Group Sheet  |  Family Chart

    Family Elgiwa Ælfgifu Mucil,   b. Abt 856, Denmark Find all individuals with events at this locationd. Abt 929 (Age ~ 73 years) 
    Children 
     1. King Gorm, Of Danmark,   b. Abt 880, Gormshoj, Jellinge, Vejle, Denmark. Find all individuals with events at this locationd. 958, Jellinge, Vejle, Denmark. Find all individuals with events at this location (Age ~ 78 years)
    Family ID F83660  Group Sheet  |  Family Chart
    Last Modified 5 Sep 2025 

  • Event Map
    Link to Google MapsBirth - Address:
    Hord - 814 - Jutland, Denmark
    Link to Google Earth
     = Link to Google Earth 

  • Notes 
    • Harthacnut or Cnut I (Danish: Hardeknud) (born c. 880) was a semi-legendary King of Denmark. Ragnarssona þáttr makes Harthacnut son of the semi-mythic viking chieftain Sigurd Snake-in-the-Eye, himself one of the sons of the legendary Ragnar Lodbrok. The saga in turn makes Harthacnut the father of the historical king, Gorm. It has been suggested he is to be identified with the Hardegon of Northmannia whose early-10th century conquest of Denmark was related by Adam of Bremen.

      «b»Ragnarsson's son «/b»
      The saga Ragnarssona þáttr relates the acts of the sons of Ragnar Lodbrok, and proceeds to link them genealogically to the later rulers of the Scandinavian kingdoms. For Denmark, it relates that by Blaeja, the daughter of King Ælla of Northumbria, Sigurd Snake-in-the-Eye became father of Harthacnut (Hörða-Knútr). Harthacnut is said to have been his father's successor in Zealand, Scania and Halland, but not the break-away Viken, and he was father of Gorm. Scholarly opinion is divided as to the degree to which the material found in such heroic sources is to be taken as authentic history and genealogy.

      «b»Anselm church bishops success of Adam of Bremen «/b»
      Two possible references to Harthacnut appear in the work of clergyman Adam of Bremen, who came from Germany to record the history of the Archbishops of Bremen (Gesta Hammaburgensis ecclesiae pontificum), partly based on information from Gorm's descendant, Sweyn II of Denmark. Adam states that a king Helge was deposed and Denmark was conquered by Olof the Brash who came from Sweden (Sueonia). Along with two of his sons, Gyrd and Gnupa, Olof took the realm "by force of arms," and they ruled it together, thus founding the House of Olaf in Denmark. Adam reports that they were followed by a Sigtrygg. That Sigtrygg was the son of Gnupa by a Danish noblewoman named Asfrid, is shown on two runestones near Schleswig, erected by his mother after his death.

      Adam then relates that after Sigtrygg reigned a short time, during the tenure of Archbishop Hoger of Bremen (909-915/917), Hardegon, son of Sweyn, came from "Northmannia" the "land of the Northmen," by which he may have meant Norway, Normandy, which had recently been colonized by Danish Vikings, or even northern Jutland. Hardegon immediately deposed the young king Sigtrygg, and then ruled unopposed for approximately thirty years. Hardegon is often equated with the Harthacnut of legend, but some historians, such as Lis Jacobsen, instead have concluded that Hardegon is distinct.

      Adam later refers to an attack on Denmark by Henry I of Germany, naming the defending king as Hardecnudth Vurm in some manuscripts,filius Hardecnudth Vurm in others. Historians generally agree that Vurm (English: worm or serpent) is a German rendering of the Danish name Gorm, and this leads to alternative interpretations, that this is reference to Gorm, son (filius) of Harthacnut, or that it is a double-name indicating that Harthacnut and Gorm were the same person. The Saxon chronicles of Widukind of Corvey reports the defeat and forced baptism of the Danish king Chnuba (Gnupa), in 934 at the hands of German king Henry. Likewise, Olav Tryggvasson's Saga tells of Gnupa's defeat by Gorm the Old. Some historians (e.g. Storm) have taken these as indications that Sigtrygg's father Gnupa still ruled at least part of Denmark much later than credited by Adam of Bremen, and his dynasty was only displaced by Harthacnut's son, Gorm.

      «b»Danish kings of the legendary «/b»
      In the late and legend-influenced Gesta Danorum of Saxo Grammaticus, Harthacnut appears as Knut. He is described as a son of Erik, a descendant of Ragnar Lodbrok, by Gudorm, the granddaughter of Harald Klak. In his version of the tale, Harthacnut is raised by Ennignup (suggested to be Saxo's rendition of Gnupa), but never accepts Christianity.

      Silverdale treasure
      In the Silverdale Hoard is a silver coin impressed with the name "Airdeconut" an Anglicized variant of Harthacnut. The hoard dates to the early 10th century, but the style is similar to coins of other viking kings of Northumbria. Thus there is no reason to suggest this coin relates to a king Harthacnut of Denmark rather than an otherwise unknown Northumbrian viking. However, some have suggested that Northumbria may be the Northmannia from which Adam's Danish conqueror Hardegon came.