Sweeney / McSweeney

This data was derived from the Leabhair Chlainne Suibhne (The Book of the Clan Sweeney), which is a manuscript of personal prayers and a family history now in the Royal Irish Academy.

The Sweeney's trace their ancestry from Niall of the Nine Hostages, the fifth century High King of Ireland, through the eleventh century King of Aileach in Donegal who was Flaherty of the Pilgroms Staff. Following a family dispute over the succession of the Aileach kingship, Flaherty's grandson, Anrathan, saiiled across the sea to Scotland. There, according to a sixteenth century family history preserved in the Royal Irish Academy, he acquired estensive lands in Argyll and married a daughter of the King of Scotland. The Sweeney (Spelt Suibhne, pron. in Irish Swivnah) from whom the family derives was a great-grandson of Anrathan who built Castle Sween in Knapdale, reputedly the oldest stone Castle in Scotland.

Suibhne is undoubtedly an Irish name. In the fifth century there was a high king of Ireland called Suibhne. There was a Suibhne Abbot of Lismore, County Waterford, and another of Clonmacnoise, County Offaly. A Saint Suibhne is recorded as dwelling on the penitential island of Skellig Michael off the Kerry coast. These were the first names, there are not necessarily any family relationships.

It was not until the coming of the Normans in the twelfth century that Suibhne was adopted as a surname by a senior branch of the Ua Niall clan of Scotland. There too the name Loughlin originated, which survives to this day as a first name in the Sweeney family.

The Sweeney family remained in Scotland until the fourteenth century, when they returned to Ireland having lost their lands in Argyll to Robert the Bruce whom they had opposed at the battle of Bannickburn in 1314. After the Battle of Bannockburn there is no further mention of the Sweeney family in Scottish History. The Sweeneys of Skipness had moved to Northumberland, and the Sweeneys of Castle Sween had returned to Ireland, where the senior branch returned to Rathmullan, almost in sight of the ancient (c. 1700 BC) stone fort, the Grianon of Aileach, from which they had departed for Scotland 200 years previously.

They then divided into three branches: MacSuibhne Fanad, MacSuibhne na d'Tuatha, and MacSuibhne Banagh. Rathmullan was the seat of MacSuibhne Fanad for the next 400 years, during which time their influence extended from Donegal into Connacht and Munster. In Donegal their principal seats were Doe Castle and Rahan Castle near Killybegs.

In Scotland the inauguration of the MacSuibhne chiefs had taken place at Iona, whree they were also buried. In Ireland they were inaugruated in Kilmacrenan, County Donegal, where MacSuibhne Fanad had the priviledge of sitting at the right had side of the O'Donnell, Prince of Tirconnell. The remains of the MacSweeneys who returned to Ireland are interred outside the walls of Castle Doe, near Sheep Haven Bay.

The names Sweeney and McSweeney in Ireland are derived from a number of Gallowglass Septs called McSuichne that were established in the country in the fifteenth century. The name is now most commonly found in the Province of Munster and in County Cork in particular where the majority of descendants can be found.


Dionosio Sweeney & Ana Luisa Dalton y Molloy ( modificado el 20.03.2017 )
Singles / Others / Otros / Sweeney ( modificado el / modified on 20.03.2017 )