<P> The Ó Dochartaigh Clann Association was formed in the 1980s by a collaboration of American and Canadian clanfolk with its base in Michigan . It operated from Inch Island, Co, Donegal from 1985 until 1999, and from Buncrana from 1999 until 2007 . The association is now based in Michigan again, offering international membership and a newsletter . </P> <P> Doherty reunions have been hosted in Ireland every five years since 1985, by the Ó Dochartaigh Irish Reunion Committee (an amalgamation of the reunion committees from Inishowen and Derry). A special reunion was held in July 2008, commemorating the 1608 death of Cahir Ó Doherty . The next reunion is scheduled for 23 - 28 July 2020 . In 2005 the reunion hosted the film premiere of Roots of a Man--"A Journey Through The Land of the Clan O'Doherty". </P> <P> A number of castles in Inishowen Donegal are considered "O' Doherty castles" as they were, at one time, in the possession of a Doherty, such as Carrickabraghy Castle . </P>

Where does the last name daugherty come from