My middle name is Baron, which derives from my great grandmother, Elizabeth, who was from Cornwall. Sadly the Baron surname died out in this branch as Elizabeth's parents, John Baron and Susan (née Thomas), had 7 daughters and no sons.
It should be noted that this family tree only covers Barons who originated from Cornwall. There are a significant number of Barons elsewhere, notably in Lancashire and other parts of northern England, but these are probably not connected.
My 2nd cousin 1x removed, (Baron) Vivian Hony, had already carried out some excellent research into the Barons of Cornwall several years ago. He had traced our mutual ancestry back to the late 16th century, when the Baron family was already well-established in Egloskerry, a village a few miles west of Launceston in Cornwall. In this he had been greatly helped by a 250 year old booklet of handwritten Baron births and deaths from 1747 to 1802 - which we refer to as the 'Baron Booklet' (a copy is at the Cornwall Record Office) - although it still required some major detective work to unravel the threads.
Viv has, as he admits, concentrated in the main on our direct Baron ancestors, who were successful farmers and landowners in Egloskerry, and later in Lanivet near Bodmin. But we also know something of several of the other branches of the family, not least George Baron (1626-1686), who was an immensely successful and wealthy merchant in London, and those Barons who settled in and around Tintagel and Lostwithiel. One, my near namesake Jonathan Baron (1706-1771), was educated at Trinity College, Oxford, and Pembroke College, Cambridge, and was vicar of Lostwithiel, Mevagissey and Tintagel - probably all at the same time!
No Cornish Baron was directly involved in the English Civil War, although two senior commanders, Colonel Robert Bennett and Colonel John Weare, were related to the Baron family by marriage.
We also know quite a bit about the Tyeth and Gundry families, with whom several of the Barons intermarried.
However, the early origins of our Baron family are less certain. The Baron Booklet refers to St. Breock as being "where the family was born", and clearly the Barons were well-established in and around St. Breock from at least 1679. Viv Hony has made the link back to George Baron of Tintagel (1609-1683) and his father John Baron of Egloskerry (d.1619). But there is research by Major Oliver Baron Shourbridge and Mrs. Dorothy Lloyd (whose 'History of the Baron Family' is lodged at the Cornwall Family History Society Library in Truro) which suggests that the Barons of Egloskerry were descended from those at Stratton. Further research is needed to prove this link.