Flynn is an Irish surname or first name, an anglicised form of the Irish Ó Floinn or possibly Mac Floinn, meaning "descendant or son of Flann" (a byname meaning "reddish (complexion)" or "ruddy"). The name is more commonly used as a surname than a first name. According to John O'Donovan's 1849 works, the modern descendants of Lugaid mac Con include the O'Driscolls, O'Learys, Coffeys, Hennessys and Flynns of County Cork. According to historian C. Thomas Cairney, the O'Flynns, along with the O'Coffeys, O'Dinneens, O'Driscolls, O'Heas, O'Hennessys and O'Learys, were chiefly families of the Corca Laoghdne tribe, who in turn came from the Erainn tribe who were the second wave of Celts to settle in Ireland from 500 to 100 BC.

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