Simplify the following text for a Grade 13 native English-speaking person.
Original: Other plotters wereThomas Winter ( also spelled Wintour ) , Robert Winter , John Wright , Christopher Wright , Robert Keyes , Thomas Percy ( also spelled Percye ) , John Grant , Ambrose Rokewood , Sir Everard Digby , Francis Tresham and Thomas Bates ( Catesby 's servant ) .
Simplified: His fellow plotters were John Wright , Thomas Wintour , Thomas Percy , Guy Fawkes , Robert Keyes , Thomas Bates , Robert Wintour , Christopher Wright , John Grant , Sir Ambrose Rookwood , Sir Everard Digby and Francis Tresham .