When Walterpertoldo died, and the first generation of the Spilimbergo ended, a contest for the succession in controlling Valvasone began between two really important families in the area: the Zuccola and the Cucagna.
The death of Walterpertoldo and the end of the first generation of the Spilimbergo family led to a power struggle between the Zuccola and Cucagna families for control of Valvasone.