Lance vs Lum

Lance

name
  • A male given name from the Germanic languages, pet form of Lancelot or transferred use of the surname; by folk etymology associated with a lance. 

  • A surname originating as a patronymic. 

Lum

name
  • An English surname transferred from the place name. 

  • A surname from Chinese. 

  • A diminutive of the male given name Columbus 

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