Green’s Dictionary of Slang

freney n.

[the 18C highwayman James Freney, who had one eye]

(Irish) a one-eyed person.

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[Ire]J.E. Walsh Ireland Sixty Years Ago (1885) 96: Those who saw and conversed with him described him as a mean-looking fellow, pitted with the smallpox, and blind of an eye, whence Freney became a soubriquet for all persons who had lost an eye.