Joan's uncle Aymon had the support of the nobles of Savoy for the Semi-Salic inheritance and succeeded as count.

After the marriage, Joan renewed her claim on Savoy and allied herself with the Dauphin de Viennois against her uncle.

[2] By agreement settled by the French King [4] on 22 November 1339, she renounced her rights of succession in return for an annual income of 6000 livres.

In 1343, when her uncle Aymon died, Joan renewed her claim on the county of Savoy against her nine-year-old cousin, Amadeus VI.

In the end, he negotiated a similar settlement to the one of Joan, yielding the claim in exchange for 5000 livres annually.