Sorry to burst your bubble, but it’s Paddy. Patty is a girl’s name, short for Patricia.
We’ll I, descendant of Patrick Joseph born on st Patricks day am humbly corrected
From the irish examiner among others am requested to refer to it not, as the people in my American parish, I always thought, have, as either st. Patricks Day, or Paddy’s Day, and not as st party’s day, or even as St Paddy’s day
Thank you