Costello during a December 1975 interview with RTÉ
Wicklow County Councillor
In office March 1967 – October 1977
Constituency
Bray
Personal details
Born
1939 Old Connaught Avenue, Bray, County Wicklow, Ireland
Died
5 October 1977 (aged 38) North Strand, Dublin, Ireland
Political party
Irish Republican Socialist Party
Other political affiliations
Sinn Féin (1955–1970) Official Sinn Féin (1970–1974)
Spouse
Maeliosa Costello
Children
4
Seamus Costello (Irish: Séamus Mac Coisdealbha, 1939 – 5 October 1977) was an Irish politician. He was a leader of Official Sinn Féin and the Official Irish Republican Army and latterly of the Irish Republican Socialist Party (IRSP) and the Irish National Liberation Army (INLA).
He argued for a combination of socialist politics on economic issues and traditional physical force Irish republicanism. He is best remembered for the founding of the IRSP and the INLA. He was a victim of a feud with his former comrades in the Official IRA.
SeamusCostello (Irish: Séamus Mac Coisdealbha, 1939 – 5 October 1977) was an Irish politician. He was a leader of Official Sinn Féin and the Official...
time passed discontent with the ceasefire in the movement grew and SeamusCostello, IRA veteran, operations officer for "general headquarters staff" (GHQ)...
former members of Workers' Party (aka 'Official' Sinn Féin), headed by SeamusCostello. According to the IRSP, 80 people were in attendance. A paramilitary...
elements within the organisation who objected to the ceasefire, led by SeamusCostello, established the Irish National Liberation Army (INLA). Another feud...
Liberation Army (INLA) and Irish Republican Socialist Party, led by SeamusCostello (later assassinated by the Official IRA during a bloody feud). The...
[1665]". celt.uuc.ie. Retrieved 18 February 2019. McKittrick, David; Kelters, Seamus; Feeney, Brian and Thornton, Chris (1999). Lost Lives: The stories of the...
unauthorised and was condemned by INLA/IRSP leader SeamusCostello. Despite this, the OIRA tried to kill Costello on 9 May 1975 and eventually killed him two...
Russell P. J. Ruttledge Frank Ryan Seamus Robinson Seán South Austin Stack Jimmy Steele Oscar Traynor Moss Twomey Seamus Twomey Tom Williams This list includes...
the ground already angry about the ceasefire in mid 1972. In result, SeamusCostello and other socialist militants formed the Irish Republican Socialist...
(IRSP) with SeamusCostello in 1974. This was a revolutionary socialist breakaway from Official Sinn Féin and, later that same day, Costello also created...
Committee. Within the party he was a supporter of Wicklow Republican SeamusCostello. Costello, who was a member of Wicklow County Council, emphasised involvement...
following April (see also Operation Demetrius). In 1974, Bunting followed SeamusCostello and other militants who disagreed with the OIRA's ceasefire of 1972...
later, the Officials expelled SeamusCostello, its Operations Officer for what it termed "factional activity". Costello, dissatisfied with the leadership's...
Martin Malachy McGurran Billy McMillen Jim Sullivan Kenneth Littlejohn SeamusCostello Eoin Ó Murchú Tomás Mac Giolla Francis Hughes Paddy O'Callaghan Mickey...
People Gerry Adams Cathal Brugha Neil Blaney Tom Clarke James Connolly SeamusCostello Éamon de Valera Robert Emmet Cathal Goulding Thomas J. Kelly Seán Mac...
People Gerry Adams Cathal Brugha Neil Blaney Tom Clarke James Connolly SeamusCostello Éamon de Valera Robert Emmet Cathal Goulding Thomas J. Kelly Seán Mac...
the first republican paramilitary to be extradited in 1984. In 1974 SeamusCostello, an Official IRA member who led a faction opposed to its ceasefire...
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