The roots of Cornish Heritage begins with its Celtic Descendants within the Dummoni and Coronvii tribes, which have close ties with Celtic Lands of Wales, Brittany and Ireland. Dummoni and Coronvii tribes prodomatley inhabited Cornwall and had lived there between the Iron Age and the Post-Roman period. Even back then it was repressed of its culcture and langauge, specifically during the Anglo-Saxon invasion and that part of the country became more angelized. 

Regarding the name chosen (Cornwall) it is belived that it had been thought from the tribe name Cornovii. However, in those times Cornwall was often referred to as ‘Westwals’ - which transaltes to West Welsh, and a lot of the time instead of being hand in hand with the Saxon’s they were actaully at war with them. Although, later down the line came the River Tamar which evidentially separated the Cornish from this chaos and went on to be separate but protective of their Celtic Heritage. 

However, this isn't the only part of Cornwall's History it was just the beginning, another thing they are well known for is its Mining and Fishing history and landscapes. In fact, one of the most well-known mining places is called UNESCO and is a world heritage site, renowned for its history of tin and copper mining from the 18th-19th century. The ancient landmark features remnants like enging houses, mine shafts, and industrial ports. The Cornwall and West Devon Mining landscape has helped to boost and also improve global mining technology. 

It is hard to state how much profit has been gained through mining but there is statists that show copper mines in the mid-19th century showed significant wealth generated for mine investors, with over one seven-year period they gained £216,548, which at the time was considered very large. However, on the other hand if you look at shortly before the industry's decline with the last mine closing, the remaining mines were putting approximately £26 million a year into the local Cornish Economy.