One version of my family crest. A chieftain clan much feared in early Ireland. A Norman city gate had a plaque placed above it: "From the Ferocious Ó Flahertys oh lord deliver us". O'Flaherty was the original Irish family name (English spelling)....Lafferty is the English version of Flaherty. The Irish Gaelic spelling of O'Flaherty is: O'Flaithbheartaigh. Flaverty is another version of Flaherty, as Laverty is another form of Lafferty. It is also believed that Rafferty is another form of Lafferty.