Ok, 2 questions:
First, if we don't have an inner envelope, per se, but a pocket fold card, should we be treating it the same way as an inner envelope and writing names on the outside of the card?
If so...
the FI and I are both long time members of a medieval re-creation society (any other SCA-dian brides out there? 
) and about 50-60% of our guest list are our medieval family.
Now in the society, most people choose a name for their "persona", and for many of our guests they are more well known by this nickname than their given legal name (even in everyday life like at work and with non-medieval family).
Would it be a big faux pas to use just names/nicknames on the outside of the folded card (inner "envelope")?
i.e. Outer envelope would read: "Mr. & Mrs. Carlos Lastname" while on the inside it would simply read "Carlos & Mysie" (as opposed to Melissa which is her legal name).
It just seems a little silly to me to be even more formal on the inner envelope.
