How do you handle employees with similar names?

Hello,

We are in Apps 10, UPD13.  We want to clearly distinguished below two similarly named users/employees in time registration (see below figure 1).  We have changed the employee “Internal display name” (see below figure 2).  See below figure 3 for the result.

Is this the correct action to accomplish?

Will this break/impact anything in IFS due to these changes?

How do others handle this scenario?

Thank you,

Joann