Whenever the Drilling Wizard or Drilling Series is used, SolidWorks writes the name into the FeatureManager with a hint directly after the name:
In the example above, this gives us M51 or M52 for M5 threads.
I know that SolidWorks can't put the same name to the same function, but is it possible to have a space or better a hyphen so that it is more readable (e.g. M5 -1, or M5 (1))
I don't think it's possible by default in SolidWorks, but a macro could do it (you would have to run it by hand when you want it or during each recording automatically).