Siobhán O'Hanlon (1963 – 11 April 2006) was an IRA volunteer and Sinn Féin activist.O'Hanlon was born in North Belfast in 1963, one of six children of a republican family. Her father, Sam, had been interned, and her maternal uncle was IRA Army Council member Joe Cahill, who died in July 2004. O'Hanlon married Patrick Sheehan with whom she had a son, Cormac. One of her sisters, Eilis, is a newspaper columnist critical of physical force Irish republicanism; the two apparently remained estranged at the time of Siobhán's death. Wikipedia