Hi,

sadly, knowing the names of your customers is not enough. However, if you have their email addresses or phone numbers, it is possible to use the so-called Facebook Custom Audiences and create a custom list of those people.

You would upload the list of email addresses or phone numbers to Facebook and it will anonymously match them to individual Facebook profiles - after that happens, you will have a custom target audience that you can reach with any ad campaigns. This can be very powerful, as you can reach exactly just your current clients or subscribers and create highly-targeted advertising campaigns.

If you had such information (emails or phone numbers) and needed any help with creating Facebook custom audiences, feel free to get in touch and I'll be glad to help.

Cheers!
Adomas