Rubuta ci gaba don wannan sakin layi - An sa mata suna bayan mahaifiyar mahaifiyar mahaifiyarta mai suna Holy Roman Empress Eleonora, wanda shi ma mahaifiyarta ne. An yi auren iyayen Eleonora ne da nufin karfafa da'awar reshen Nevers na Gidan Gonzaga zuwa Dukes na Mantua da Montferrat lokacin da babban layin zai mutu. Duke na Nevers, mai mulkin masarautar Faransa, dole ne ya fuskanci adawa da Ferrante II Gonzaga, Duke na Guastalla, wanda ya dogara da goyon bayan Daular Roman Empire, da Masarautar Spain da kuma Duchy na Savoy, kuma ta haka ne ya fara Yaƙin Mantua Succession
, a lokacin da jariri Eleonora, tare da iyayenta da babban ɗan'uwansa Charles suka bar Mantua, amma suka dawo shekara guda bayan sanya hannu kan Yarjejeniyar Cherasco (19 ga Yuni 1631), wanda a karkashinsa aka amince da haƙƙin Duke Charles na Nevers a kan Dukes na Mantua (a matsayin mafi kusantar dangi na maza na layin Gonzaga na Gonzaga) da Montferrat (saboda auren magajinsa da Maria Gonzaga, wanda ya tsira daga karshe na Gonzaga na Gonzaga da kuma magajin wannan Duchy, wanda aka nuna shi ta hanyar mata tun lokacin da Gonzagas ya samu ta hanyar auren Margherita Paleologa a 1540); duk da haka wata daya daga baya (30 Agusta 1631), mahaifin Eleonora ya mutu daga tarin fuka, kuma ya fara jerin rikice-rikicen siyasa tsakanin Duke Charles da surukarta, wanda ya ƙare tare da fitar da Margaret na Savoy (mahaifiyar Maria) daga Mantua.