The Traversari (or domus Traversariorum, according to medieval chroniclers) are a noble Italian family. The dynasty's history was mostly connected to Ravenna, which it ruled between the 12th and 13th centuries. St. Romuald was the son of Duke Sergio degli Onesti of Ravenna and of Traversara Traversari, daughter of Teodoro Traversari, son of Paolo I Traversari.
According to the legend, the family's origins date back to the 5th century. The progenitor was one Teodoro, a general of the Heruli, the people led by King Odoacer, who in 476 took control of Italy. This Teodoro allegedly founded a castle in the middle of the plain created by the river Lamone, called Traversara Castle, from which his descendants would later take their surname.
After the death of Odoacer (around 490), Teodoro Traversari went into the service of the new conqueror, Theodoric, King of the Goths, being named Duke, which title would be passed to his descendants. Teodoro was appointed the Prefect of Ravenna; later he became a Patrician, then he was elected Consul. After the death of Theodoric, Italy began a rapid decline. In 553 the Byzantine completed the conquest of the Italian peninsula, establishing their capital in Ravenna. During the period of Byzantine domination, the Traversari occupied several important positions.
Girolamo Rossi sketched a family tree of the house in the book Historiarum ravennatum books (1572). He wrote that the first to use the designation of "Traversaria" was one Duke Paul, who died in 947. A branch of the family, about the year 1000, moved to Venice, where they obtained the patrician status. From here they took a new surname, as the noble Venetian family called "Lezze". The main branch of the family remained in Romagna.
The Traversari family held possessions in Ravenna and in the countryside, exercising a dominant role in the city. The Traversari extended their influence over much of the northern Adriatic. In 1024 Rustico Traversari had properties in Adria, Comacchio, Ravenna, Cervia, Imola, Faenza, Rimini, Jesi and Ancona.