Henry O'Brien, Lord Ibrackan

Who is Henry O'Brien, Lord Ibrackan?

Henry O'Brien, Lord Ibrackan or Lord O'Brien, styled Hon. Henry O'Brien until 1657, was an Irish nobleman and politician. He was the son of Henry O'Brien, 7th Earl of Thomond and Anne O'Brien.

He married Katherine Stuart, 7th Baroness Cifton, daughter of George Stuart, 9th Seigneur d'Aubigny and Lady Katherine Howard: the Aubigny Stuarts were a junior branch of the royal family. They had six children:

Donough O'Brien, Lord Ibrackan

Hon. Henry O'Brien

Hon. Charles O'Brien

Hon. George O'Brien, died young

Hon. Mary O'Brien, married John FitzGerald, 18th Earl of Kildare

Katherine Hyde, 8th Baroness Clifton, married Edward Hyde, 3rd Earl of Clarendon

In 1661, he represented Clare in the Parliament of Ireland, and from 1670 until his death in 1678, Northampton. In 1673, he was appointed to the Privy Council of Ireland. His wife's relationship to Charles II gave them a valuable opening at Court, where they already had a friend in Sir Joseph Williamson and they enjoyed high favour in the 1660s.

He died of disease while in camp with his regiment in Flanders. His courtesy title passed to his younger half-brother Henry Horatio O'Brien, Lord Ibrackan. Katherine within three months married their old friend, the statesman Sir Joseph Williamson; the speed of the marriage gave rise to unkind rumours that the pair had been lovers, and the marriage was disapproved of, even by her children, since Williamson, the son of a country vicar, was not considered a suitable match for a connection of the King.