Beatty – Wikipedia

Beatty is a surname of Scottish and Irish origin. In some cases from Bartholomew, which was often shortened to Bate or Baty.Male descendants were then often called Beatty, or similar derivations like Beattie or Beatey. The name Beatty or Beattie, others think, arose in Ireland from Betagh, a surname meaning hospitaller.A majority of people named Beatty or Beattie in Ireland are the descendants …

https://en.wikipedia.org/wiki/Beatty