John O'Mahony

Biography

John Francis O'Mahony (1815 – 7 February 1877) was an Irish scholar and the founding member of the Fenian Brotherhood in the United States, a sister organisation to the Irish Republican Brotherhood. Despite coming from a reasonably wealthy family and being well educated, the primary pursuit of O'Mahoney's life was that of Irish Independence from the United Kingdom, a calling that ultimately left him in poverty. O'Mahony fought in the Young Irelander Rebellion of 1848 as well as the American Civil War, and was involved organisationally in the Fenian Rising of 1867 in Ireland and the Fenian Raids on Canada.

Bio from Wikipedia