Marguerite de Roussillon, marchesa di Riva

In Riva di Chieri on 28 November 1629, he secretly married his long-time and official mistress, Marguerite de Rossillon, marchesa di Riva di Chieri (bap. 24 December 1599 – 10 November 1640), with whom he had four children, legitimized after the wedding but without succession rights: [citation needed]

• Maurizio (died 1645), Marchese di Poirino, Cavalry colonel.
• Margherita (died 1659), Signora of Dronero, Roccabruna e San Giuliano, married Filippo Francesco d’Este, Marchese di San Martino in Rio (ancestors of Maria Teresa Cybo-Malaspina).
• Gabriele (died 1695), Marchese di Riva, Cavalry lieutenant general.
• Antonio (died 1688), Abbot of San Michele della Chiusa (1642), of Santa Maria d’Aulps (1645), of Altacomba (1653), of San Benigno di Fruttuaria (1660) and Casanuova (1687), Lietunenat General of the County of Nice (1672).

https://en.wikipedia.org/wiki/Charles_Emmanuel_I,_Duke_of_Savoy