I would suggest nameisok package. Currently in addition to pypi repository check as @Afternoon's package checks, it also checks for existing package names in GoogleBigQuery database.
As @user66081 suggested it checks for similarity and provides a warning.
pip install nameisok
from command line / terminal
nameisok myawesomePackageName
or for multiple names,
nameisok pandas,example,numpy,myawesomePackageName