Pierce O'Brien Butler (died 1812) (1772–1812) Parents Catherine Butler William O'Brien Butler Children Jane O'Brien Butler Pierce O'Brien Butler Grace O'Brien Butler Mary O'Brien Butler Margery O'Brien Butler Catherine O'Brien Butler Edmund O'Brien Butler Mary Anne O'Brien Butler Frances O'Brien Butler William O'Brien Butler John O'Brien Butler Murrough O'Brien Butler Siblings Mary Anne O'Brien Butler Murrough O'Brien Butler Edmund O'Brien Butler Partners Elizabeth Power