Errico is one of the surnames to have emerged from the beautiful and historical Italian region of Tuscany. During the Middle Ages, as populations grew and travel between regions became more frequent, the people of Tuscany found it necessary to adopt a second name to identify themselves and their families. This process of adopting fixed hereditary surnames in Italy began in the 10th and 11th centuries, but it was not completed until the modern era. The patronymic surname, which is derived from the father's given name, was one of the most common names created at that time in the region of Tuscany. The surname Errico came from came from the Teutonic name Henry. In fact, the name Henry is derived from the Old German Haimric which means home-rule. There were many Teutonic names in Italy following the fall of the Roman Empire.
Italian surnames have a surprising number of forms in comparison with other European surnames because they reflect the regional variations and the many dialects of the Italian language, each of which has its distinctive features. For example, in Northern Italy the most standard Italian surname suffix is "I", whereas in Southern Italy the most typical surname suffix is "O". Sardinian is very different from other forms of Italian and in fact, it is considered to be its own distinct language. Additionally, spelling changes frequently occurred because medieval scribes, church officials, and the bearers of names, spelled names as they sounded rather than according to any specific spelling rules. As a consequence of the major changes in the Italian language and in the local spellings of Italian surnames that occurred over the course of history, there are numerous variations for the surname Errico. These spelling variations include and others.