Ireland has been referred to in many ways but not to best of my knowledge as the Isle of Man - could joke that the Elizabethan law forbade the landing of beggars from both Island and the Isle of Mann so no confusion there - the name Man or Mannin has been around in literature for about 2000 years.

I suspect all McCombes have an Irish origin - in 1841 seems to be 3 families in Rushen