Prior to his death, Jean I regulated the succession of Monaco, and allowed for female succession provided that a female heir kept her own name Grimaldi after marriage and passed it on to her children, and that her husband should take the name and arms of his wife. He was succeeded by their son Lord Catalan. Catalan was reportedly influenced by his mother and his brother-in-law Pierre Fregoso, who came from his mother's family. Catalan had no male heir. In his will, he stated that he was to be succeeded by his daughter Claudine who (to adjust to the will of his father that a female ruler was not to result in a change in dynasty), was to marry her cousin Lamberto, Lord of Monaco. He further appointed his mother Pomellina Fregoso regent of Monaco until his daughter's majority and, in the event of Pomellina's death, that Pierre Fregoso should succeed her as Claudine's regent until her majority. In July 1457, Catalan died when Claudine was at the age of six, and Pomellina Fregoso duly became regent of Monaco in accordance with the written will of her son. However, Claudine's fiance Lambert opposed the will and demanded part of the regency, and his demand was supported by the population. On 20 October therefore, Pomellina saw herself forced to sign a statement in which she was to share the power of regency with Lambert. Pomellina then prepared to have Lambert ousted and killed in a coup in collaboration with Pierre Fregoso and Pierre Grimaldi, Lord of Beuil, the latter of whom she promised to make the father-in-law of Claudine. In March 1458, the plot was staged, but Lambert managed to escape: with the support of the population of Menton and Roquebrune, he deposed Pomellina's regency government, confined her to her house in Menton, and had himself declared sovereign Lord as well as the regent and possessor of the rights of Claudine. On January 1460, a plot staged by Pomellina, Pierre de Beuil and the Count de Tende (again with Claudine and her dynastic rights in the center) resulted in an attack on Monaco and Lambert's rule, which failed. In 1466, Pomellina Fregoso, who had gathered support among the population of Menton, managed to stage and support a rebellion against Lambert in the provinces of Menton and Roquebrunem who called for support from the governor of Nice.