Now on My Fourth Companion Pass!
I've just issued my fourth companion pass for 100 credits. It is still the best. No blackout dates, no capacity controls. It's still for the same class of service (business or coach), but as an Elite that means I can pay for a B or Y class ticket and get business class at no additional charge -- she does as well.
The name can be changed once per quarter, but it is for a calendar quarter and would not recommend it unless you really have several different traveling buddies and are trying to spread the love.