Wat vs Watt

Wat

name
  • A medieval English given name, short for Walter or from the Anglo-Saxon name Watt. 

Watt

name
  • A diminutive of the male given name Walter, of medieval usage, variant of Wat. 

  • An Anglo-Saxon given name. 

  • Watt, a king of Sussex. 

  • An English and Scottish surname originating as a patronymic. 

  • A ghost town in California, United States. 

How often have the words Wat and Watt occurred in a corpus of books? (source: Google Ngram Viewer )