A few more related points:-
1. "Barrett, Baroid in Munster, Bairead in Connacht, these families came with the Anglo-Norman invasion and became completely hibernicized". (McLysaght - Surnames of Ireland).

2 Eoghan Coir: "a vicious mock lament on a bailiff" - Oxford Companion.

3. "In the 18th century Richard Barrett (c1740-1818), the 'Poet of Erris' was a prominent United Irishman" - MacLysaght- Irish Families.

4. "Brian O'Higgins [composer of the song 'Cumann an mBan'](1882-1949) born Kilscyre, Co. Meath was TD for Clare (1922)" - Oxford Companion. He was president of Sinn fein in 1930s. His best known songs include "Moses Ritoolarilay" [a satire on the ban on using the Irish form of shop names- recorded by Margaret Barry], "Soldiers of '22", "Maurice O'Neill [IRA man executed by Free State]", "O Donovan Rossa", "The Irish Volunteers", "Victoria [a threat to demolish an Irish statue of Queen Victoria - recorded by Grehan Sisters]", "Bonfire on the Border", "The Boy from Tralee [Charlie Kerins - IRA man executed by Free State]". 107 of his songs were published by him, with intros, in the Wolfe Tone Annual 1950".

5. "In April 1914 the first meeting to start Cumann na mBan was held in Wynn's Hotel, Abbey Street, Dublin. Miss Agnes O'Farrelly was in the chair. Among those present were Mrs Wyse Power, Madame O'Rahilly, Mrs Eamonn Ceannt, Mrs John [Eoin] MacNeill, Mrs Kettle, Miss Lily O'Brennan, Mrs Dudley Edwards, Miss Louise Gavan Duffy, Miss Carney, from the north [James Connolly's secretary in 1916?], another lady from the north whose name I have forgotten, and myself."
Kathleen Clarke [Tom Clarke's widow] - Revolutionary Woman: My Fight for Ireland's Freedom,O'Brien Press, Dublin, 1991. Very interesting, first hand account of 1916 and related matters -BT.