Siobhán Maguire

Siobhán Maguire, Baroness Dungannon (also anglicised Joan Maguire; died 1600) was a Gaelic Irish noblewoman, perhaps best known as the biological mother of Hugh O'Neill, Earl of Tyrone.

She held a prominent political role, and was considered "head and counsel of advice to the gentlemen and chiefs of Ulster".

Biography Her father was Cúconnacht Maguire, Lord of Fermanagh. On 8 October 1537, Cúconnacht was murdered on the island of Craghan in Lough Erne. and Hugh. Historian John O'Hart referred to Cormac and Art as illegitimate (i.e. not Siobhán's children). Conversely, historian Emmett O'Byrne stated that all four of Matthew's sons were legitimate. Matthew was killed in 1558 by Shane's foster family, placing heirs Brian and Hugh in a dangerous situation. At some point between May and August 1558, English statesman Sir Henry Sidney organised the retrieval of the two boys, and they briefly stayed at his Dublin residence before being fostered by the English Hovenden family. Brian and Hugh were raised by Giles Hovenden and his second wife Joan Walshe. chief advisor to the O'Donnell clan of Tyrconnell. O'Gallagher was a major adherent to tanist Hugh Roe O'Donnell during the 1580–1592 Tyrconnell succession dispute. Her son Hugh was the leader of the Irish confederacy during the war. She present at a dinner at Lifford in May 1595, which was in the honour of Spanish captain Alonso Cobos, who had recently arrived to assess the situation in Ireland and prepare the confederates for upcoming Spanish reinforcements.

Siobhán died in 1600. She was buried in Donegal Abbey, where her father had been interred in 1537.