Doll vs Nan

Doll

name

  • A diminutive of the female given name Dorothy. 

  • A surname. 

Nan

name

  • A diminutive of the female given name Ann and Nancy. 

  • A province of Thailand. 

  • A city in Thailand. 

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