International Brigades
 |
 |
 |
 |
 |
 |
| Archibald Baillie (Belfast) | Victor Barr (Belfast) |
| David Barrett | Paddy Barry (Mayo) |
| Phil Boyle (Donegal) | Peter Brady (Cavan) |
| Michael Brennan (Kilkenny) | Liam Burgess (Cork) |
| Paddy Byrne (Dublin) | William Byrne (Manchester) |
| James Campbell (Derry) | Jimmy Carroll (Liverpool) |
| Charles Colman (Cork) | Colm Cox (Dublin) |
| Vincent Crampton (Cork) | Seamus Cummins (Dublin) |
| Andrew Delaney | Jerry Delaney |
| Alec Digges (London) | Gerry Doran (Dublin) |
| Sean Dowling (Castlecomer) | Eugene Downing (Dublin) |
| Bob Doyle (Dublin) | Gerard Doyle (Limerick) |
| Patrick Duff (Dublin) | Frank Edwards (Waterford) |
| Andrew Flanagan (Roscommon) | Terence Flanagan (Dublin) |
| ? Flynn (Derry) | Willie Fulton (Belfast) |
| Sean Goff (Dublin) | Pat Hamill (Cavan/New York) |
| James Haughey (Lurgan) | T. Hayes (Dublin) |
| Tom Heeney (Galway) | Robert Hepburn (Dublin) |
| James Hillen (Belfast) | Robert Hilliard (Kerry) |
| Denis Holden (Carlow) | Jackie Hunt (Waterford) |
| Hugh Hunter (Belfast) | Patrick Keenan (Dublin) |
| Chris Kelly | John Kelly (Waterford) |
| Michael Kelly (Galway) | David Kennedy |
| Steve Kenny (Belfast) | Jim Larmour (Belfast) |
| George Leeson (Cork) | Michael Lehane (Kerry) |
| John Lemon (Waterford) | Maurice Levitas (Dublin) |
| Pat Sarsfield Long (New York) | Bill Lord (Belfast) |
| Joe Lowry (Antrim) | Alan MacLarnan (Dublin) |
| Thomas Maguire | Chris Martin (Cork) |
| Charles Matthews (London) | John McAleenan (Down) |
| Paddy McAllister (Belfast) | Seamus McBroin |
| Cormac McCarthy | Pat McGrath (Cork) |
| Charles McGuinness (Derry) | Pat McGuire |
| Paddy McIlroy (Dublin) | Bernard McKenna (Manchester) |
| Paddy Roe McLaughlin (Donegal) | Joe Monks (Dublin) |
| Brendan Moroney | Paddy Murphy (Belfast) |
| Pat Murphy (Liverpool) | Tom Murphy (Belfast/Liverpool) |
| Pat Murray (Liverpool) | Arthur Nicholl (Limerick) |
| John (J.J.) O'Beirne (Cavan) | Thomas T. O'Brien (Liverpool) |
| Tom O'Brien (Dublin) | Peter O'Connor (Waterford) |
| Paddy O'Daire (Donegal) | Patrick O'Dea (Donegal) |
| Hugh O'Donnell (Donegal) | Vincent O'Donnell (Dongeal) |
| J. O'Driscoll (Cork) | Eddie O'Flaherty (Boston) |
| Frank O'Flaherty (Boston) | Liam O'Hanlon (Belfast) |
| George O'Neill (Newcastle-on-Tyne) | James F. O'Regan (Cork) |
| Donal O'Reilly | John O'Reilly |
| Michael O'Riordan (Cork) | John O'Shea (Waterford) |
| Jackie Patterson (Belfast) | Sean Penrose (Dublin) |
| Billy Power (Waterford) | John Power (Waterford) |
| Paddy Power (Waterford) | Jim Prendergast (Dublin) |
| Sidney Quinn (Lisburn) | Pat Reade |
| Jim Francis Regan (Cork) | Joeseph P. Rehill (New York) |
| Pat Reid (U.S.A.) | John Quigley Robinson (Belfast) |
| M. Roe (Athlone) | Paddy Scanlan (Cork) |
| Bill Scott (Dublin) 1 | John Patrick Simms (Tipperary) |
| Paddy Smith (Dublin) | Patrick Stanley (Dublin) |
| John Sullivan 2 | J. Tierney (Limerick) |
| Pat Tighe (Mayo) | Paddy Trench (Dublin) 3 |
| Michael Waters (Cork) | Joe Whelan (New York) |
| Jack White (Antrim) 4 |
Taken from Michael O’Riordan's “The Connolly Column” &
Fearghal McGarry's “Irish Politics and the Spanish Civil War”
1. Bill Scott fought with the Thaelmann Centuria.
2. John Sullivan fought with the Basque forces.
3. Paddy Trench fought with the POUM militia.
4. Jack White went to Spain with the British Red Cross, but it is believed that he became involved with the Anarchist militia.