Peter de Bermingham was the Anglo-Irish second lord of Athenry who died c. 1309.
Peter was a son of Meyler, who founded the town of Athenry in Clann Taidg, County Galway.
Myler's widow Joan remarried the prominent English-born judge Sir John de Fressingfield.
She brought a lawsuit against Peter over her dower, which included Knockgraffon Castle in County Tipperary.
Her date of death is not recorded: Sir John, who had returned to England, was still alive in 1322.