1788 - 1877 (~ 89 years)
According to the DNA test results of members of the Campbell family in the United Kingdom, Ireland, North America, Australia, and elsewhere, various branches of the family diverged from a common ancestor within the past several hundred years. If you are carrying the Campbell surname, you are welcome to join the Campbell DNA Project, which is currently being hosted by Family Tree DNA.
Creations – Lord Campbell, 1445; Earl of Argyll, 1457; Lord Lorne, 17 April, 1470; Duke of Argyll, Marquess of Kintyre and Lorne, Earl of Campbell and Cowall, Viscount Lochow and Glenyla, and Lord Inverary, Mull, Morvern, and Tirie, all in the peerage of Scotland, 23 June, 1701. Baron Sundridge, 22 Dec, 1766; Baron Hamilton, 20 May, 1776, in Great Britain. Duke of Argyll in United Kingdom, 7 April, 1892.
Seats – Inverary Castle Argyll and Rosneath House, Dunbarton, N.B. Town Residence – Kensington Palace, W. Club – Athenæum.
