Orso was born about 1234. Orso's father was Gentile+ Orsini. His paternal grandfather was Matteo Rosso+ Orsini and his paternal grandmother is Perna+ Caetani. He had a brother and a sister, named Bertoldo+ and Elizabetta. He was the second oldest of the three children. He died about 1327.
General Notes
SOURCES: "Ancestors/Desendants of Romano Orsini" http:/www.geneastar.org.