Tito Vespasiano Strozzi
He was a courtier of successive dukes of Ferrara , Leonello , Borso , and Ercole d'Este , and was entrusted with several important posts in the civil magistrature . 
<triplet> Leonello <subj> dukes of Ferrara <obj> position held <subj> Ercole d'Este <obj> sibling <triplet> Borso <subj> Ercole d'Este <obj> sibling