Politics and Public Administration

Cearbhall O'Dalaigh - 1928 (President of Ireland)

Liam Cosgrave - 1937 (Taoiseach)

Richie Ryan - 1946 (Minister for Finance)

Frank Feely - 1949 (Dublin County Manager)

Dr. Michael Woods TD - 1954

John Swift - 1958 (Irish Ambassador - The Netherlands)

Hugh Swift - 1961 (Irish Ambassador - South Africa)

Liam Lawlor TD - 1962

Eric Byrne TD - 1965

Dermot McCarthy - 1971 (Secretary General to the Government)

Legal / Public Office

John A. Boland - 1949 (H.M. Public Trustee)

Peter Doyle - 1959 (EC Representation in Ireland - Director)

Chief Justice Aindrias O'Caoimh - 1968 (High Court)

Rory Brady - 1975 (Attorney General)

John Leamy - 1969 (Chief Administrative Officer - An Garda Siochana)

Gerard Harrahill - 1979 (Collector General- Revenue)

Bishop John Moore SMA - First Bishop of Bauchi, Nigeria

Sport

Dr. Kevin O'Flanagan - 1939 (Irish Rugby & Soccer International)

Michael O'Flanagan - ? (Arsenal and Ireland)

Dan Hingerty - 1942 (Irish Rugby International)

Cormac O'Cleirigh - 1944 (Olympic Athlete)

William A. (Billy) Ringrose - 1947 (Irish Army Equestrian)

Liam Whelan - 1952 (Member of the Busby Babes - Deceased)

Tommy Hamilton - 1953 (Shamrock Rovers)

Ollie Byrne - 1962 (Shelbourne F.C.)

Eddie Jordan - 1966 (Formula 1 Team Owner)

Donnacha O'Dea - 1966 (Swimming & 1998 World Series Poker Champion)

Don Givens - 1967 - (Irish Soccer International)

Anton O'Toole - 1969 (Dublin All Ireland Medal Winner '74, '76 and '77)

John Coady - 1978 (Chelsea 1986 - 88)

Andy Reid - 1999 or 2000 (Nottingham Forrest and newest Serior Irish Internationl)

Humphrey Murphy - 1981 - Climbed Mt. Everest in August 2005

Arts and Entertainment

Cecil Sheridan

Noel Purcell

Jack McGowran

Noel Andrews - Sports Commentator

Eamonn Andrews - Sports commentator, TV presenter and 1st Chairman of RTE Authority

Ronnie Thornton - (Sports Commentator)

Liam Brown - (Sports Commentator)

Patrick Swift - about 1940 (Artist)

Anthony Hughes - 1945 (Professor of Music, U.C.D., and composer)

David Kelly - 1948 (O'Reilly the Builder in "Faulty Towers")

Don Cockburn - 1948 (RTE Newscaster)

Des Hickey - 1948 (Radio Arts programme presenter)

Donal Donnelly - 1949

Milo O'Shea

Gay Byrne - 1952 (The Late Late Show)

Kieran Hickey - 1953 (Film Director)

Brendan O'Brien - 1953 (Leader of Bournemouth Symphony Orchestra)

Bob Quinn - 1954 (Film Director)

Jim Norton - 1956 (Bishop Brennan from "Fr. Ted")

Eamonn Morrissey - 1961 (Film - Eat the Peach)

Niall Stokes - 1969 (Hot Press Magazine & IRTC)

Black Family (The boys obviously)

Fr. Tom Burke 1941 (Co-Founder of Young Scientist of the Year Competition)

Literature

James Plunkett Kelly - (c1937 - Strumpet City) 

John Jordan - 1948 (Academic and literary critic)

Cornelius Ryan - (The Longest Day)

John Connolly - 1984

Business

Ron Bolger - 1965 (Former Chairman of Bord Telecom)

Don Godson - 1957 (Chairman of CRH)

Kieran McGowan - 1961 (Chief Executive of IDA)

Jim Culliton - 1952 (Chairman of AIB)

Dermot Nally - 1947

Ronald Corbett - 1957 (Chief Executive Amev Insurance)

Liam Donlon - 1965 (Director, Irish Intercontinental Bank)

Peter Keenan - 1968 (Chief Executive of Parc Group)

Brian Forrester - 1969 (Managing Director or ICS Mortgagelink)

Dermot Jewell - 1969 (Chief Executive of Consumer Association of Ireland)

David Simpson - 1972 (BDO Simpson Xavier)

John O'Dwyer - 1974 (Managing Director of Friends First Life Assurance)

Austin Hughes - 1975 (Chief Economist of Irish Intercontinental Bank)

John O'Neill - Chief Executive of Axa

John Corrigan - Director of the NTMA

Journalism

Richard Grogan - 1956 (Irish Times Political Editor)

Deaglan deBreadun - 1967 (Irish Times Political Editor)

Pat Courtney - (Irish Independent Sports Editor)

Tony Leen - 1982 (The Examiner Sports Editor)

Martin Wall - 1984 (Sunday Tribune News Editor)