My thoughts - Northfield didn't have an Indian name (like Owatanna or Shakopee) so the high shool didn't pick an Indian type of mascot. What other type of feared fighter or attacker could one pick to strike fear in your heart if you were a violent-fierce football team? Ghengis Khan - a raider from the east, sweeping across the plains - killing those in his path! Wielding his sword against innocent freshman attackers from the surrounding schools.

NORthfield HIghschool - NORHI'ian - that was our best guess - right?