From Woulfe's 1923 book
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Ó LONÁIN—I—O Lonane, O Lonan, O Lonnan, O Lannan, O Lennane, Lenane, Lanon, Lannan, Lannon, Lannen, Lannin, Lennon, (Leonard); 'descendant of Lonán' (diminutive of lon, a blackbird); the name (1) of a Cork family who were originally settled in the neighbourhood of...