Over the last three decades, following the pioneering work of Jacob Katz, scholars such as Israel Yuval, Elliott Horowitz and Luciano Allegra have renewed the historiography of the Jewish family in medieval and early modern Europe. Within this framework, our research focuses on a largely unexplored issue: patrimonial transmission in Jewish societies of the western Mediterranean, particularly in Iberia. Heritage, due to its legal, socio-economic, cultural and anthropological dimensions, is crucial to understanding social reproduction and the functioning of Jewish communities, shaped by diverse migratory waves and local contexts.