The suffix "-iello" of the surname Minichiello, is one of those suffixes such as "-ino", "-one", and "-etto", which give a particular flavor and meaning to nouns and adjectives to which they are attached. Since the Middle Ages, they were and are used with first names to indicate size, age, affection, physical and moral qualities, and have for the most part developed inside the family circle as pet names.
The suffix "-iello" in the surname Minichiello is akin to other suffixes such as "-ino," "-one," and "-etto." These additions give words a particular character and significance. Throughout history, these suffixes have been used with first names to signify size, age, affection, physical attributes, and moral qualities, often serving as endearing nicknames within the family.