$ sudo apt-get update
$ sudo apt-get install geoclue-geonames 

geoclue-geonames is installed in your system.

Make ensure the geoclue-geonames package were installed using the commands given below,

$ sudo dpkg-query -l | grep geoclue-geonames *

You will get with geoclue-geonames package name, version, architecture and description in a table

geoclue-geonames package basic information: