1916 Easter Rising Centenary: Profiles of the leaders ... Fifteen leaders of the 1916 Easter Rising were executed by the British after being court-martialed. These executions took place between May 3rd and May 12th, 1916. One other leader, Roger Casement, was executed later, on August 3rd. The executed leaders included: Thomas Clarke Seán Mac Diarmada Thomas MacDonagh Patrick Pearse Éamonn Ceannt James Connolly Joseph Plunkett Edward Daly Michael O'Hanrahan William Pearse John MacBride Con Colbe