1924, Paris: The Water Polo team of Ireland.

The team of Ireland that took part in Paris 1924 Olympic Games: Charles Barrett, James Beckett, James Brady, John Convery, Charles Fagan, Michael O’Connor, Noel Purcell, William Fagan, Norman Judd, John O’Connor.

Source: private collection

1928, Amsterdam: The team of Ireland

The team of Ireland that took part in Amsterdam 1928 Olympic Games. Back Row L- R: Thomas “Hayes” Dockrell (Dublin University SC, Full-back), Lt. Joseph A. O’Connor (RCSI graduate, RAMC, Aldershot Command, Forward); Charles Fagan (Sandycove SC, Forward); Mr A.J. Cullen, President Irish Amateur Swimming Association. Front Row L- R: Norman F. Judd (Dublin SC, Full-back); Michael Anthony O’Connor* (Dublin SC, Captain, Brother of J.A. O’Connor, Half-back); Patrick “Paddy” McClure (Clonard SC, Belfast, Forward); Stanley “Stan” Moore (East End SC, Belfast, Goal).  Missing from the photograph are the two reserves James S. Brady (Sandycove SC, back) and Henry Graham Ellerker (Dublin University SC, forward).
Source: http://www.geheugenvannederland.nl/, Player's identification by Mr. Cyril J Smyth (Fellow Emeritus Chairman DUCAC Sports Centre, Trinity College, University of Dublin, Dublin 2, Ireland)

1900: The National team of Ireland

The National team of Ireland that lost the match against the Welsh National team in 1900.

Source: Black and White Budget; Sept. 1, 1900

1920's: The ladies team of Donegall ASC

The ladies team of Donegall ASC, Ireland in the 1920's.
Source: http://donegallasc.org/

1934: The team of Clontarf Club of Dublin

The team of Clontarf Swimming and Water Polo Club of Dublin, Ireland in 1934.
Standing L-R: O’S Roche, W. P. Willis, M.S. Mahony, E. J. Lighfoot. Seated L-R: J. Hannon, T. A. O’ Relly (cap.) and P.J. Lavery.
Source: El mundo deportivo 21 September 1934