"Pons Novus Villa Willielmi Marescalli"

"New Bridge, the Town of William Marshall"

founded in 1207

The ambition of the new Lord of Leinster, Guillaume Le Marechal, now known as William Marshal - and his wife Isabella de Clare - heiress of Diarmait Mac Murchada, King of Leinster - was the force which drove the founding of the town of Ros.