I'm afraid the name Déja Vu is already taken in Hungary.
I don't know how much this matters over there:) .

I must think there are several bands in various countries with this name....

Oh, yeah, now I realise the point...  My brain is slow, and I don't always catch everything. So is my drumming: I always play a fraction of a second (or sometimes half a second!) after the beat - any idea to help with this?

Yeah I think we (I mean people thinking seriously about this above) are much older than who could really help with a name for a recent young band - but hopefully, haven't we given some points for choosing a name. A totally different name, perhaps.