A cadet branch of the Mantua Gonzagas became Dukes of Nevers and Rethel in France when Luigi (Louis) di Gonzaga, a younger son of Duke Federico II and Margerita Paleologa, married the heiress. The Gonzaga-Nevers later came to rule Mantua again, when Louis' son Charles (Carlo) inherited Mantua and Montferrat, triggering the War of the Mantuan Succession.
Francesco II (1484-1519)
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Federico II (1519-40) Ferrante of Guastalla
| | (1539-57)
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Francesco III (1540-50) Guglielmo I (1550-87) Louis of Nevers (1581-95) Cesare I of Guastalla
| | | (1557-75)
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Vincenzo I (1587-1612) Charles III of Nevers (1595-37) Ferrante II of Guastalla
| /Carlo I of Mantua (1627-37) | (1575-1630)
|----------------|---------------| |
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Francesco IVFerdinando IVincenzo II Cesare II of Guastalla
(1612) (1612-26) (1626-27) (1630-32)
The branches of the Gonzaga family, showing the main line in bold (Dukes of Mantua), the Nevers line in italics (Dukes of Nevers and Rethel) and the Guastalla line to the right.
Bibliography
Brinton, Selwyn (1927). The Gonzaga. Lords of Mantua. London: Methuen.