My son (and many others) trace the name Bohane back to a "gentle and scholarly" monk, O Buadhachan, who became a 'confidant' of the queen of Munster (Cashel) and apparently had a child by her (out of wedlock,) who was called Ceallachain, who became king of Munster. (whose family split and became the O'Callaghans and the McCartys). When Brien Boru conquered around year 1000 AD, O' Buadhachan and his rels escaped (though some were slaughtered) and probably headed north to Scandinavia, as their tribe was allied to the Norsemen, where they subsequently headed south via France (the Beauharnais - one of whom married Josephine who subsequently married Napoleon) then later some went back to Ireland where the name became Anglised in about the 15th century to Bohane, some of whom later returned to France (town of Bohan where Henri Matisse was born). Our family Bohane probably came to Cork from Kinsale though the great fire in Cork wiped out most of the historical documents.
Incidentally, the forebears of O' Buadhachan can be traced, by oral history, back to about the 4th century. Tim