Calpee, India (born 1830). William Desmond Taylor, film director in the United States, murdered (born 1872). 3 February – John Butler Yeats, artist and father of William Butler Yeats and Jack Butler Yeats (born 1839). 16 April – Frank Lawless, Sinn Féin TD, member of the 1st Dáil and the 2nd Dáil (born 1870). 29 April – Richard Croker, politician in the United States and a leader of New York City's Tammany Hall (born 1843). 22 May – William J. Twaddell, Ulster Unionist Party MP, assassinated by Irish Republican Army (born 1884). 31 May – Joseph McGuinness, Sinn Féin MP and TD, member of the 1st Dáil (born 1875). 22 June – Sir Henry Wilson, British Field Marshal and Conservative Party politician, killed by the IRA (born 1864). 7 July – Cathal Brugha, active in Easter Rising, Irish War of Independence, and Irish Civil War and first Ceann Comhairle of Dáil Éireann, shot by Free State troops (born 1874). 26 July – John Clark, boxer (born 1849). 2 August – Harry Boland, Irish Volunteer in Easter Rising, Sinn Féin MP, shot by members of the Free State National Army (born 1887). 12 August – Arthur Griffith, founder and third leader of Sinn Féin, served as President of Dáil Éireann (born 1872). 22 August – Michael Collins, Revolutionary and Commander-in-Chief of the Irish Free State Army, Cabinet Minister, shot and killed (born 1890). 21 September – Frederick Thomas Trouton, physicist responsible for Trouton's Rule (born 1863). 24 November – Erskine Childers, writer, nationalist, executed by Free State firing squad (born 1870). 8 December – executed in Mountjoy Jail during the Irish Civil War Richard Barrett, Irish Republican Army member (born 1889). Joe McKelvey, Irish Republican Army officer (born 1898). Liam Mellows, Sinn Féin politician, member of 1st Dáil (born 1895). Rory O'Connor, Irish republican activist, captured at the fall of the Four Courts (born 1883). 20 December – Séamus Dwyer, Sinn Féin politician, shot (born 1886). 25 December – Joseph MacDonagh, anti-Treaty Sinn Féin member of 1st Dáil representing Tipperary North, insurance broker (born 1883). References 1920s in Ireland Ireland Years of the 20th century in Ireland