That site didn't have my name listed, but according to ancestry.com, the surname Angle means:
1. English and Irish (of Norman origin): topographic name from Middle English and Old French angle ‘angle’, ‘corner’ (Latin angulus). As an Irish surname, it can also be habitational, from a place in Pembrokeshire, South Wales, named with this word.
2. Americanized spelling of German Angel or Engel.