Borso d'Este (1605 – 28 December 1657) was an Italian general, a member of the ducal House of Este.
He had another four brothers, Luigi, Lord of Montecchio and Scandiano, Ippolito, Niccolo, and Foresto; as well four sisters, Giulia, Laura, Caterina and Anna Eleonora, all of whom survived childhood.
He moved to the Holy Roman Empire, where he attended a military academy and joined the Imperial Army.
In 1640, he was summoned back to the Este territories by his nephew Francesco I, Duke of Modena to fight against Spanish troops from the Duchy of Milan.
[3] Borso fell in love with his niece Ippolita, the illegitimate daughter of his brother Luigi, Lord of Montecchio and Scandiano.