Substate | Defunct
1858 CE to 1880 CE
The Fenian Brotherhood is an Irish republican organization founded in the United States in 1858 by John O'Mahony and Michael Doheny.
It was a precursor to Clan na Gael, a sister organization to the Irish Republican Brotherhood.
Members are commonly known as "Fenians".
O'Mahony, who is a Celtic scholar, names his organization after the Fianna, the legendary band of Irish warriors led by Fionn mac Cumhaill.
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