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Which patrons supported Leonardo da Vinci during his second stay in Milan?

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Self-portrait of Leonardo da Vinci drawn in red chalk, showing an elderly man with long hair and a flowing beard, with a serious, contemplative expression. — Leonardo da Vinci Self-portrait, drawing by Leonardo da Vinci, c. 1517–18; in the Royal Library, Turin, Italy.

During his second stay in Milan (1508–1513), Leonardo da Vinci was supported by two primary patrons: the French governor of Milan, Charles d’Amboise, and King Louis XII of France.1

Leonardo was highly honored by these patrons, and his duties were largely focused on providing advice regarding architectural matters. Notable projects during this period included:1

Architectural designs: He created plans for a palace-villa for Charles d’Amboise and sketches for an oratory at the church of Santa Maria alla Fontana, which was funded by the governor.1
Engineering: He worked on a project to link Milan with Lake Como via the Adda River.1
The Trivulzio Monument: Leonardo also received a commission from Gian Giacomo Trivulzio, a marshal in the French army, to sculpt an equestrian tomb monument for the church of San Nazaro Maggiore, though the project was eventually abandoned.2