The surname Rossiello originates from Italy, dating back to the medieval period. It is believed to have derived from the Italian word "rosso," meaning red, potentially referring to an individual's red hair color or complexion. Alternatively, it could also be linked to the Italian word "rossello," which means reddish or a diminutive form of the color red.

The earliest recorded instances of the Rossiello name can be traced back to historical documents from the 13th and 14th centuries in regions such as Campania, Basilicata, and Calabria, located in southern Italy. Some of these records include mentions of individuals bearing the Rossiello surname in legal contracts, property deeds, and local census records.

One notable historical figure with the Rossiello surname was Giovanni Rossiello, a prominent jurist and legal scholar born in Naples in the late 15th century. He authored several influential treatises on Roman law and served as a legal advisor to the Kingdom of Naples during the Renaissance period.

Another individual of note was Tommaso Rossiello, a skilled architect and engineer from Salerno, who lived in the 16th century. He was responsible for designing several churches and public buildings in the region, including the Church of San Giorgio in Salerno, which showcased his exceptional architectural talents.

In the 17th century, records indicate the presence of a wealthy merchant family named Rossiello in the city of Reggio Calabria. Their trading ventures extended throughout the Mediterranean, and they played a significant role in the economic development of the region.

During the 18th century, a renowned painter named Antonio Rossiello gained recognition for his masterful works depicting religious scenes and landscapes. He was born in Potenza in 1715 and spent much of his career in Naples, where his art was highly celebrated by patrons and collectors alike.

Another notable figure was Giuseppe Rossiello, a military commander who served in the Napoleonic Wars of the early 19th century. He rose through the ranks and participated in several significant battles, earning himself a reputation for bravery and strategic acumen.

The Rossiello surname has also been associated with various place names throughout southern Italy, such as the town of Rossiello in the province of Cosenza, and the village of Rossello in the province of Salerno. These locations may have influenced the surname's development or served as the original birthplaces of individuals bearing the name.