Big Board parent NYSE Euronext and Deutsche Börse have a load of new worries now that Nasdaq OMX Group is leading a bid to bust up their $25bn deal. But the two exchanges have another fundamental question to ponder: What to name their 6,500 -employee, $5.4bn-revenue trans-Atlantic combination.

In coming weeks, the exchanges will appoint a committee of marketing and legal specialists to sift through more than 1,000 suggested names submitted by employees of both companies. A separate group of branding specialists also is recommending new names.