Comment by ssl-3

nVidia comes from the Latin word invidia, which means things like envy, or jealousy.

Microsoft (originally Micro-Soft) is a portmanteau of microcomputer and software.

Facebook, as others have mentioned, is a compound word that was borrowed from what literal books of faces [and names] were called.

When I think of non-dictionary names, I think of things like Mosptnspg.