Sidney Czira (née Gifford) | |
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| Born | Sidney Gifford 3 August 1889 Rathmines, Dublin, Ireland |
| Died | 15 September 1974 (aged 85) Dublin, Ireland |
| Other names | John Brennan |
| Occupation(s) | Journalist, broadcaster and writer |
| Relatives | 11 siblings, including |
Sidney Sarah Madge Czira (née Gifford; 3 August 1889 – 15 September 1974), known by her pen name John Brennan, was a journalist, broadcaster, writer and revolutionary. She was an active member of the revolutionary group Inghinidhe na hÉireann (Daughters of Ireland) and wrote articles for its newspaper, Bean na h-Éireann, and for Arthur Griffith's newspaper Sinn Féin.