Polissena Sforza 
Polissena was born in 1428. Polissena's father was Francesco I Sforza and her mother is Giovana D' Acquapendente. She had three half-brothers and two half-sisters, named Galeazzo Maria, Lodovico, Tristano, Elizabetta and Ippolita Maria. She died at the age of 21 in 1449.General Notes
SOURCES: "Ancestors/Descendants of Royal Lines" (Contributors: Manuel Abranches de Soveral, Reynaud de Paysac, F.L. Jacquier <Genealogy of Lewis Carroll, Justin Swanstrom, The Royal Families of England Scotland & Wales by Burkes Peerage; Debrett's Peerage & Baronage; Table of descendants French Canadian Genealogical Society>, H.R. Moser <Burke Peerage>, L. Orlandini, O.Guionneau, L.B. de Rouge, E. Polti, A.Terlinden <Genealogy of the existing British Peerage, 1842>, L. Gustavsson, C. Cheneaux, E. Lodge, S. Bontron <Brian Tompsett>, R. Dewkinandan) http://geneastar.org.
‌Polissena and Sigismondo Pandolfo were married in a religious ceremony in 1442. They had a daughter named Giovana.