However, you could use some general terms depending on the context:
* Individuals: If you're talking about them as separate people.
* Friends: If they are friends.
* Colleagues: If they work together.
* Sisters: If they are sisters.
* Names: If you are simply referring to their names.
You could also use a more descriptive phrase:
* The two women named Tracy and Courtney.
* Tracy and Courtney, the friends from school.
Ultimately, the best noun to use depends on the specific situation and the relationship between Tracy and Courtney.