Sidney Sarah Madge Czira, 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 and wrote articles for its newspaper, Bean na h-Éireann, and for Arthur Griffith's newspaper Sinn Féin.

Grace Evelyn Gifford Plunkett was an Irish artist and cartoonist who was active in the Republican movement, who married her fiancé Joseph Plunkett in Kilmainham Gaol only a few hours before he was executed for his part in the 1916 Easter Rising.