You can use some two of the
Plus!-tags in your custom names, (!N) and (!M)...
In that way you can create for example:
Contacts email: "blah@mail.com"
Contacts display name: "I'm home"
Contacts real name: "John"
Custom name you can give to him: "John: (!N)"
This will output as "John: I'm home"
or
Custom name you can give to him: "((!M)) (!N)"
This will output as "(blah@mail.com) I'm home"
or
etc...