Fenian Brotherhood
![Supplement given with the Weekly Freeman of October 1883](/Images/godic/202501/12/Going_Underground5438.JPG")
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The Fenian Brotherhood (Irish:Bráithreachas na bhFíníní) was an Irish republican organisation founded in the United States in 1858 by John O'Mahony and Michael Doheny. It was a precursor to Clan na Gael, a sister organisation to the Irish Republican Brotherhood. Members were commonly known as "Fenians". O'Mahony, who was a Celtic scholar, named his organisation after the Fianna, the legendary band of Irish warriors led by Fionn mac Cumhaill.