“Brexit” (Great Britain/British + exit) is a word created to define a possible British exit from the eurozone. “Brexit” has been cited in print since at least May 2012. A similar term—“Brixit” (Great Britain/British + exit)—was used in June 2012.
 
“Grexit” (Greece/Greek + exit) was coined in February 2012 and was clearly the inspiration for “Brexit.” “Gerxit” (Germany/German + exit) and “Spexit” (Spain/Spanish + exit) both date from May 2012.
 
November 2015, Management Today, “Diary” by Howard Davies, pg. 24:
Frexit - which sounds like a cholesterol-rich breakfast - is highly unlikely. The French remain in large majority convinced that Europe works for them. Since they designed it that may not be a surprise. The Swedes are a little more concerned. They think that our departure would tip the balance in the European Council away from Northern free-traders and towards Southern protectionists. But Swexit is still seen as a highly remote possibility. There is not much appetite either for Spexit or Pexit, and Iexit can’t even be pronounced. So the consensus is that we will be marching offinto the Northern sunset on our own, unless the Greeks stumble again.
 
The Wall Street Journal
Britain’s EU Choice: ‘Brexit’ or ‘Bremain’?
As Britain debates whether to leave the European Union, the coined words ‘Brexit’ and ‘Bremain’ get a workout
By BEN ZIMMER
Feb. 26, 2016 10:12 a.m. ET
(...)
Mr. Rahbari’s coinage circulated quickly among observers of the European economic crisis, and soon it spawned portmanteau words involving other countries, such as “Spexit” for Spain, “Frexit” for France, “Czexit” for the Czech Republic and “Fixit” for Finland.
   
Newsweek
SWEDES COULD SUPPORT A ‘SWEXIT’
BY JOSH LOWE ON 4/18/16 AT 3:00 AM
Britain is facing the possibility of “Brexit,” The Czech Prime Minister recently fretted about “Czexit,” and Marine le Pen has been gleeful at the level of support for “Frexit.” Now it’s time for a new portmanteau in Europe’s mounting identity crisis; a poll shows there could be support for a “Swexit.”
 
Only 39 percent of Swedes think it’s a “good idea” that Sweden is in the European Union compared to 59 percent in autumn 2015, The Local reports.