Where did your Username come from?

[Magnamancy]

Mine has bugger-all to do with my real name

I picked 'Mancy' from 'Necromancy' ('Necromancy' (original meaning)= 'To converse w/ the dead', ergo 'Mancy' = 'To talk to' (latin))

And I thought 'Magna' sounded good w/ it.
(found out later 'Magna' = 'Great' (latin))

So, my 'name' actually means something, which is:
'To talk to Greatness'

I've also gone by(before I stuck to this):

Hypermancy
Ultimancy
Negamancy
^(>.<)^

and many more that I can't remember