Ok, my friend's tree contains the following famous people, all closely related or direct line:
-- an 19th century doctor, social reformer, bibiliophile and writer of books, famous in Dublin
--- the Dublin coroner mentioned by name in James Joyce
--- a mayor of Dublin who, when he wasn't being Mayor, ran a building company resonsible for building all those gorgeous fin de siecle buildings in central Dublin which are now embassies and the like
--- the person who was in charge of Uttar Pradesh (on behalf of the British govt) prior to India's independence; he went on to run Afghanistan then the suez canal (plus ca change re foreign affairs, hey?!)
--- even other people in her tree whose achievements might be less well-known, moved in the circles where their names were regularly in the "court and social column" in the Irish Times
--- the family owned the house where WB Yeats family had lived
All the above are proven; unproven as yet, but I'm pretty certain it's true, are her relationship to Oscar Wilde (probably distant cousin) and descendence from the well-known (in their time!) "Ferocious O'Flahertys" who terrorised Galway 500 years ago
and me? FWK almost all the way!