Queen Isabeau des Baux, 3rd princess of Altamura

Not her cousin Isabella Branković

-https://it.wikipedia.org/wiki/Isabella_del_Balzo (daughter of Pirro)

http://www.our-royal-titled-noble-and-commoner-ancestors.com/p3054....

-http://fmg.ac/Projects/MedLands/NEAPOLITAN%20NOBILITY.htm#IsabellaB...

iv) ISABELLA (-in France 1533 or 1537).

m (contract 16 Aug 1483, Andria 28 Nov 1486) as his second wife, FEDERIGO of Naples, Principe di Squilacce, Altamura e Taranto, son of FERRANTE I King of Naples [Aragon] & his first wife Isabelle Guilhem de Clermont [Isabella di Chiaromonte] Signora di Taranto (Naples 19 Apr 1452-in prison Plessis-lès-Tours 9 Nov 1504). He succeeded his nephew in 1496 as FEDERIGO IV King of Naples.