Post by AcapoThank you so much for your reply, I really appreciate the information provided. I think my next step is definitely reaching out to professionals to look more into this for me. The coat of arms is Italian, and our surname is considered to be not very common these days so it’s made searching on my own rather difficult.
Even in Italy, the twelfth century saw little if anything in the way of heraldry. The north of the country was part of the Holy Roman Empire, where coats of arms were limited to a few of the independent dukes and counts. The south, including Sicily, was in the hands of the Norman adventurers, descendants of Tancred de Hauteville, who did not use coats of arms until much later. The centre was ruled by the Pope who had nothing to do with coats of arms, which were associated with war and particularly with tournaments. The Church tried very hard, with little success, to prohibit tournaments and to excommunicate those who took part until well into the thirteenth century.
The German noble, Welf VI, a younger son of Henry the Black, Duke of Saxony and Bavaria, and uncle of Emperor Frederick Barbarossa, was created margrave of Tuscany and duke of Spoleto 1152–1162. He had an equestrian seal with a lion on the shield, but this was probably just decoration rather than true heraldry. Otherwise, there is little other evidence for twelfth-century Italy.
The best introduction to early Italian heraldry, even if it is now a little dated, is probably John Goodall, 'Heraldry in Italy during the Middle Ages and Renaissance', Coat of Arms no 37, January 1959, available at https://www.theheraldrysociety.com/articles/heraldry-in-italy-during-the-middle-ages-and-renaissance/
Peter Howarth