To seal the new alliance between Besalú and Barcelona, William agreed to marry Raymond Berengar's sister-in-law, Llúcia, daughter of Count Bernard I of La Marche. On 11 December 1054, William signed a scriptura dotis, a charter granting a dower to Llúcia.
To solidify the alliance between Besalú and Barcelona, William agreed to wed Raymond Berengar's sister-in-law, Llúcia, daughter of Count Bernard I of La Marche. On 11 December 1054, William signed a document granting Llúcia a dowry, a charter.