Can you call on and worship Allah without knowing His name?

I've just answered a question, and then posted this comment : >If your asking is Allah the universe then no, Allah is seated upon his throne, i.e. islam does not claim Allah is omnipresent. If you are asking if what they call the 'universe' is actually Allah then...I'm going to say no but it's not as clear cut. *I don't think anyone calling on the 'universe' consciously or subconsciously would 'get' Allah, unless they intended to call on him.* So I'm left wondering (as I am not 100% certain, and at a slight tangent), if you called upon Allah but not by a known name, but in your heart you wanted 'whatever supreme power out there' to respond (even if you called it 'the universe'), would that be considered Taghut? Would that be a valid (if flawed) form of right-worship?