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William I (or in Occitan: Guilhem I) was the founder of a dynasty which bears his name, the Guilhems, Lords of Montpellier. He received his fief (a manor) of Monspestularius (Montpellier) on 26 November 985 from Bernard, Count of Mauguio, with the permission of Ricuin, Bishop of Maguelone.
|Lord of Montpellier|
|Tenure||985 – 1025|
|Successor||William II of Montpellier|
Without descendants after his death, his nephew Guilhem II of Montpellier succeeded him.
- "SEIGNEURS de MONTPELLIER". Medieval lands. Retrieved 6 Dec 2019.