I was reading some older Astonishing X-Men comics yesterday. There was an arc (sorry, don't remember the name, but it is just before they find that Ghost Box) in which Hisako (Armor) would often call a teammate by their names instead of their codenames. In one of these situations, she called Emma "Miss Frost", to which Emma replied something like "we're in mission, you should call me Emma". In a similar moment involving Cyclops, he told Armor to call him by his codename. I found it strange, since he apparently had no problem with Emma herself not having a codename.  
 
I mean, "White Queen" is more a title for the Hellfire Club's Inner Circle than a code name. It would be quite offensive to the X-Men if she started using that again. Personally, I liked the one Emma used in that Young X-Men story arc (End of Days, I think), "Diamond Heart". So, do you think it is time for Emma to get a new code name?

I had been thinking of this since a long time, but a came to the conclusion that a code name it's just not Emma's thing. Think about it. It just doesn't apply.

I REALLY LIKE WHITE QUEEN BECAUSE ALL THE MARVEL U SEE HER AS THAT BECAUSE OF HER PAST AND THE INTERPRETATION OF HER  
AND DIAMOND HEART IS REALLY IRRELEVANT SO I LIKE WHITE QUEEN

"Personally, I liked the one Emma used in that Young X-Men story arc (End of Days, I think), "Diamond Heart". So, do you think it is time for Emma to get a new code name? "

I like Diamondheart. xD

I can't see myself calling Frost any other name than White Queen

I don't think she needs a codename. 

I don't think she needs one.  Codenames are used to protect your identity in the field and does Emma real give a crap about protecting her identity.  I think as a character the use of a code name is a bit beneath her.  You don't exactly see her wearing an X-Men uniform, so why would she adopt a code name?

I totally made this thread years ago, "Treasure Chest" was a name that was suggested.