Bristle vs Feather

Bristle

name
  • Bristol, England (in imitation of the local dialect) 

Feather

name
  • An English surname originating as an occupation. 

  • An anglicized Americanized German surname from German, equivalent to English Feather. 

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