Aymer de Valence, 2nd Earl of Pembroke (c. 1275 – June 23, 1324) was a French-English nobleman, with strong connections both to the English and French royal houses. One of the wealthiest and most powerful men of his age, he was a central player in the conflicts between Edward II and his nobility, particularly earl Thomas of Lancaster. He suffered a great insult when Piers Gaveston, a prisoner in his custody, was removed and beheaded on the instigation of Lancaster. This led Pembroke into close and lifelong cooperation with the king. Later in life, however, political circumstances combined with financial difficulties would cause him problems, driving him away from the centre of power.
Pembroke left no legitimate issue, but is today remembered through his wife's foundation of Pembroke College in Cambridge, and for his splendid tomb that can still be seen in Westminster Abbey.