Thomas de Berkeley, known as The Rich, feudal baron of Berkeley, of Berkeley Castle in Gloucestershire, England, was a peer. His epithet, and that of each previous and subsequent head of his family, was coined by John Smyth of Nibley, steward of the Berkeley estates, the biographer of the family and author of Lives of the Berkeleys.

Roger Mortimer, 3rd Baron Mortimer of Wigmore, 1st Earl of March, was an English nobleman and powerful Marcher Lord who gained many estates in the Welsh Marches and Ireland following his advantageous marriage to the wealthy heiress Joan de Geneville, 2nd Baroness Geneville. Her mother was of the Royal House of Lusignan. In November 1316, he was appointed Lord Lieutenant of Ireland. He was imprisoned in the Tower of London in 1322 for having led the Marcher lords in a revolt against King Edward II in what became known as the Despenser War.