Coombs Genealogies


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Lambert I, Count of Nantes, Prefect of the Breton March, Duke of Spoleto

Lambert I, Count of Nantes, Prefect of the Breton March, Duke of Spoleto

Male Abt 785 - 836  (51 years)


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  • Name Lambert I  
    Suffix Count of Nantes, Prefect of the Breton March, Duke of Spoleto 
    Birth Abt 785  Nantes, Brittany, France Find all individuals with events at this location 
    Gender Male 
    Death 1 Sep 836 
    Person ID I26352  Coombs
    Last Modified 13 Dec 2014 

    Father Guido, Warden of Breton March,   b. Abt 760, Hornbach, Bergstrasse, Hessen, Germany Find all individuals with events at this locationd. Bef 819 (Age < 58 years) 
    Family ID F9188  Group Sheet  |  Family Chart

    Family Adelaide,   b. Abt 795, of, , Italy Find all individuals with events at this locationd. Yes, date unknown 
    Children 
     1. Guy I, of Spolete,   b. Abt 820, Spoleto, Umbria, Italy Find all individuals with events at this locationd. 860 (Age 40 years)
    Family ID F9187  Group Sheet  |  Family Chart
    Last Modified 2 Feb 2026 

  • Notes 
    • Lambert I (died 836) was the Count of Nantes and Prefect of the Breton March between 818 to 831 and Duke of Spoleto between 834 and 836. Lambert succeeded his father Guy.
      Lambert participated in an expedition undertaken by Louis the Pious in 818 against the Bretons, who had proclaimed Morvan Lez-Breizh their king. In 822, a new Breton chief Wiomarc'h rebelled, but submitted in May 825 at Aachen. On his return to Brittany, Lambert had him assassinated.
      In 831, Lambert joined the rebellion of Lothair I against Louis and was exiled across the Alps,[1] where he was given the Duchy of Spoleto in 834. He was one of many among Lothair's entourage to die in an epidemic of 836.
      Lambert married firstly Itta, who bore his eventual successor in Nantes, Lambert II. Subsequently, he married Adelaide of Lombardy, the eldest daughter of Pepin of Italy, who was in turn the eldest son of Charlemagne that had children. Adelaide bore him another son, Guy, who would succeed him in the duchy of Spoleto. Guy's son Guy III of Spoleto was a descendant of Charlemagne through Lambert's wife, Adelaide, and was crowned Holy Roman Emperor.