"Henry VIII lost no time in making moves to suppress what he referred to in a letter to Charles Brandon as the ‘Christmas Rising’. His first move was to write to Pope Clement VII, seeking confirmation of the fact that England held Ireland as a Papal fief. This, he received in the spring of 1529, by which time he had already dispatched Brandon and a force of 5000 men to Dublin, with orders to combine with the supplementary force that Anthony Knivert, Viscount Lovell, was bringing from Normandy, and drive north into Gaelic Ireland to suppress the ‘rebel earls’ as he called Brian Og of Osraige, Conn O’Neil of Tir Eoghain, and Hugh O’Donnell of Tyrconnell.
Brandon used the same technique of chevauchee that had served the English so well in taking Normandy, sweeping through the country fast and burning what his troops could not use. He knew that the Gaelic were not trained to fight a pitched battle the way his soldiers were, and decided that the best chance he had of forcing the Gaelic Lords into submission was to deny them the fruits of the land they knew and loved so well.
It was not an easy task. The few dispatches we still have from the era suggest that Brandon and Lord Lovell were barely out of the saddle for two years, harrying the rebels and/or riding through the Pale soliciting support from loyal dynasties such as the Fitzgeralds of Kildare, the Butlers and the Boleyns of Ormonde and Pembroke. Indeed, the new Lord Ormonde himself seems to have fought at the battle of Tawnybrack in County Antrim in 1530, for Lord Lovell’s report declares him to be both ‘valiant’ and ‘grievously wounded’. Unusually, there is no description of the wound, which has led historians to speculate that the Queen’s brother may have been damaged in the more private nether regions, especially when the injury is coupled with the fact that, despite having had five pregnancies in the first six years of her marriage, so far as we know, the Countess of Ormonde and Pembroke failed to fall pregnant after the birth of her daughter Lady Matilda in June 1527.
By the spring of 1531, King Henry was losing patience. Ireland was becoming a dangerous drain on his resources, especially when he always had to keep one eye on Normandy, for fear King Francis would try to seize the lands he had once lost. Having tried vinegar, he now tried to catch his flies with honey. He sent envoys to O’Donnell and O’Neill, promising them that, if they would only surrender to him, he would grant them back their lands as Earldoms under his sovereignty, sovereignty he had gained a few months earlier by paying the Pope a princely sum equivalent to more than ten years' worth of tithes from the English Church.
It was a bold gamble, but, as many of Henry VIII’s gambles seem to have done, it paid off. O’Donnell and O’Neill submitted to Brandon, Lovell and Lord Ormonde – as Lord Pembroke was always known in Ireland - in March 1531, before sailing for Westminster and swearing allegiance to Henry VIII, King of England and Ireland, as newly-created Earls at the Easter Court of 1531.
Without the support of more powerful Gaelic lords, Brian Og’s own rebellion, stoked by his wish to reclaim his ancestral lands from the King’s natural daughter, Lady Grace Fitzroy, fizzled out. He seems to have faded into obscurity after the end of the uprising, for we see him in the records only once more, when he appears at Lord Pembroke’s Michaelmas feast at Raglan in 1533, handing his new-born son, Barnaby, over to Lord Pembroke’s custody as a guarantee of his good behaviour."
_______Connor FitzSutton “Taking Root: The first Century of the Tudor dynasty: 1485-1575, Vol II ‘Ireland’”