Guillemundus (also Guillemó) (died 827) was count of Razès and Conflent, in what is now southern France.
He was the son of Bera, Count of Barcelona.
[1][2] Guillemundus retained the counties when Bera was exiled to Rouen in 821/22.
In 826 he joined the revolt of Aissó and, routed, fled to Córdoba.
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