Question

whose ear did peter cut off

Answer 1

Peter cut off the ear of Malchus, the servant of the Jewish High Priest Caiaphas, to prevent Jesus from being arrested. This was mentioned in John 18:10 “Then Simon Peter, having a sword, drew it and struck the high priest’s servant and cut off his right ear. (The servant’s name was Malchus.)”

Answer 2

According to what mentioned in John 18:10 “Then Simon Peter, having a sword, drew it and struck the high priest’s servant and cut off his right ear. (The servant’s name was Malchus.)”. Simon Peter cut off the ear of the Jewish High Priest Caiaphas servant, whose name was Malchus, because Peter wanted to protect Jesus from being arrested.