There is a genealogy that has come to light that traces directly back to the Ard Righ King Flann Sinna of Meath's daughter Princess Spontana of Crimthann that married into the line of the Royal House of Alpin down through King Alpins second son Donald I of Alpin and continued down through his direct descendents of MacFhingon's...
I am a Mackinnon cadet of the Chief's family descended from the 25th Chief, Lachlan Og. My Y-DNA indicates that I am descended from the Celtic royal house, however, the senior representatives family of the male line of the original Gaelic royal house of Scotland are probably the MacGregors of Glen Carnaig- led by Sir Malcolm MacGregor, 24th Chief of Clan Gregor. His DNA supports this claim. He is also descended in several female lines from the Stewart kings. Another candidate for headship of Scotland's original Celtic royal house would be Hugh Mackay, 14th Lord Reay, Chief of Clan Morgain or Mackay. His family claims descent in the male line from King MacBeth's uncle, Prince Donald of Moray, and in the female line from King Lulach, the last of the Celtic royal house to reign over the Scots, whose daughter married the great-grandson of the above Donald of Moray. Lord Reay's DNA has not been tested, however, but the DNA of those Mackays who have been tested indicate kinship with Sir Malcolm MacGregor, and descent from the kings of Dal-Riada and Alba (Scotland).
I am also a cadet of the Mackinnon chiefs. According to Rev Donald Dimsdale Mackinnon, author of the respected
Memoirs of Clan Fingon, published in 1890 and again in 1899, Sir Lachlan "Mor", 28th Chief, had at least two sons by his
first marriage to Mary Maclean of Duart and Morvern. The first of these, Iain, died
vita parentis, but was the father of the famous Iain Dubh, 29th Chief, who fought for King James VIII and his son, Charles Stuart. The second son was Donald, who after a fall out with Sir Lachlan, emigrated to Antigua, where he became a member of the Legislative Assembly, and practiced (without licence) as a physician. He changed his first name to Daniel, and died in 1720. His son, or grandson, actually travelled to Edinburgh to record his family tree at the Lyon Court. It was Daniel's great-grandson, Wiliam Alexander who was designated 33rd Chief by Lord Kinoul, the Lord Lyon, in 1811, after a dispute of three years, following the death of John of Riachan, 31st Chief without heirs in 1808. Anne Mackinnon, 38th Chief is a direct descendant of William Alexander.
Ian of Mishinish, 1st Chieftain of Mishinish, was the only son of Sir Lachlan, above, by his
second marriage to a daughter of The Macleod of Macleod, or the MacLeod of Uilnish. Ian died as late as 1759 in Mishinish, Isle of Mull. Therefore, his line could not possibly be senior to that of the present chief (his half-brother Donald/Daniel died in 1720).
I am, however, in dispute with the Lyon Court over the nomination of Anne's son, Andrew, as her heir. His father is an Englishman, Allan Jeffrey, who is not a Mackinnon. The true heir is Anne's nearest agnatic cousin (in terms of the Lyon Court ruling of 1811), who descends in the male line from Captain Lachlan Bellingham Mackinnon, 2nd son of the 33rd Chief. This elusive heir lives in America. I am still trying to track him down. He should succeed Anne as 39th Chief. She became Chief as a consequence of the death of her brother, Andrew, in a motor accident in September, 1964. Her uncle, Lt Col Ian Kroyer Mackinnon, resigned his rights to the Chiefship in her favour. He wrote a letter to me confirming this.