Patty
Usually a pet-form surname from Patrick, though in some cases it may also come from the personal name Patty/Mattie.
The #9,794 most common surname in the United States (2010 Census) — about 1 in every 93,389 Americans shares it.
Etymology
In surname use, Patty is generally understood as a nickname-based form of Patrick, with related forms like Pat, Pate, Paddie, Pattie, and Patterson. The deeper root of Patrick is the Latin name Patricius, meaning roughly “noble” or “of the patrician class.” Some 19th-century writers also noted a separate English nickname chain from Martha to Mattie to Patty, so not every family with this surname necessarily descends from Patrick.
History
Bardsley especially associates Patty with northern English surname patterns and treats it as a shortened, familiar form used in family naming. The name is comparatively uncommon as a surname, and historical records show it appearing alongside related forms such as Pattie and Patey. Because the spelling also overlaps with the everyday given name Patty, some bearers may have different origins.
Origin
Regions
Variant spellings
Fun fact
Bardsley remarks that Patty could be explained in more than one way, making it a good example of how nickname surnames can have overlapping origins.
From the historical record
“PATTIE [v. Patey, etc. PATTY J PATTIN. V. Patten. , PATTINGHAIVI (Eng.) Bel. to Pattinghain (Staffs), the Domesday Patingham = the Home or Estate, of the Patt(a or Peatt(a Family [A.-Sax. *P{e)attinga- hdm — -inga, genit. pi. of the fil. suff. -ing; Mm, home, etc.] PATTINSON, Pattin's Son: v. Pattin,”
— Surnames of the United Kingdom: a concise etymological dictionary (2 vols in 1)