marianna de leyva y marino was born in milan, italy, on december 4, 1575. she was the daughter of martìno de leyva and virginia maria marino, widow of ercole pio count of sassuolo, and great granddaughter of antonio de leyva, who has inherited the title of county by charles v. virginia was the daughter and direct heir of one of the richest men in milan, the banker tommaso marino.