Giselbert I |
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| Died | 1014 |
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| Other names | Giselbert I of Roussillon |
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| Spouse | Beliarda |
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| Children | Gausfred II,
Sunifred,
Berengar |
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Giselbert I (Catalan: Guislabert) (died 1014), count of Roussillon (991–1013), was the son of Gausfred I. His father divided his lands between his sons, giving Ampurias to Hugh I and Roussillon to Giselbert.
Though the patrimony was divided, both brothers continued to claim and annex territory belonging to the other and war was common, even among their descendants.
In 1014, Giselbert died. After his death Hugh I tried to reunify the counties and invaded the county of his nephew. It was not until 1020 that Hugh I was repelled and Gausfred II, Giselbert I's son, definitively succeeded.
By marriage to Beliarda, he produced three sons:
