The aliases tool allows you to save alternative names to a person record that can be used when adding a person to a company. The alias will link back to their main person profile and the alias will be used in all document automation. This allows you to have one person that can be called different names for different contexts.
To create an alias, navigate to a person record under People and the Alias section will be at the bottom of the Contact tab.
Click on the + button to add a new alias and the X button to delete an alias.
Once you have created an alias, it will be available to use when adding a person as a principal into an entity record.