Though I have never heard
Patty being used as a nickname for
Martha, I can understand how it could be. In England there were so few names being used that some of the nicknames were often given other letters so as to give them some differentiation. There would be too many Margarets shortened to
Meg (or
Meggy, I guess), that they just changed the M to a P, and it became
Peggy. There were too many Richards who went by
Rick that they'd change the first letter of
Rick and get
Dick (or Hick).
With
Martha, you could get the nickname
Matty, which, à la
Peggy, could be changed to
Patty given those principles.
This message was edited 12/1/2015, 7:38 PM