Argentina Spinola

Argentina Spinola (1294–1337) was the daughter of Opizzino Spinola, captain of the people of Genoa, and Violante of Saluzzo. In October 1307 she married in Constantinople Theodore Palaiologos, son of the Byzantine emperor Andronikos II and heir to the March of Montferrat; with her father's backing the couple seized power at Casale.

While Theodore was absent in Constantinople from 1325, Argentina governed Montferrat as regent until his return in 1328. She died at Casale early in 1337, leaving a son, the future Marquess John II.