The term "Lepontii" refers to an ancient group of people who lived in the region of the Lepontine Alps in what is now northern Italy and southern Switzerland. They are believed to have been part of the broader Celtic culture, known for their unique language and customs. The Lepontii are often associated with the Celtic tribes that inhabited the area during the Iron Age. Archaeological evidence, including inscriptions and artifacts, suggests that the Lepontii had a distinct identity within the Celtic world. Their language, known as Lepontic, is considered a branch of the Celtic languages and provides insights into the cultural and linguistic diversity of ancient Europe.