Costanza Orsini 
Costanza was born about 1420. Costanza's father is Carlo Orsini and her mother is Paola Orsini. Her paternal grandparents are Giovanni Orsini and Bartolomea Spinelli; her maternal grandfather was Giacomo Orsini and her maternal grandmother is Isabella De Marzano. She had three brothers and three sisters, named Latino, Napoleone, Roberto, Clarice, Bartolomea and Maddalena. She is the third oldest of the seven children.General Notes
SOURCES: "Ancestors/Descendants of Royal Lines" (Contributors: Manuel Abranches de Soveral, Reynaud de Paysac, H.R. Moser <Burke Peerage>), L. Orlandini, O.Guionneau, L.B. de Rouge, E. Polti, A.Terlinden <Genealogy of the existing British Peerage, 1842, and E. Lodge>) http://geneastar.org.
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Ancestor Pedigree Chart
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*There are earlier generations for the ancestor(s) indicated. See their page(s) for details (click name)
- b.~ 1248 d.>Apr 1282
- b.~ 1268 d.> 1300
- b.~ 1250 d.>09 Mar 1270
- b.~ 1300
- b.~ 1340
- b.~ 1310
- b.~ 1388
- b.~ 1355
- b.~ 1420
- b.~ 1268 d.> 1300
- b.~ 1290 d.>27 Jun 1360
- b.~ 1320 d.~ 1390
- b.~ 1360 d.> 1431
- b.~ 1388
- b.~ 1365
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They have a son named Matteo.
