Agnosticism should not be confused with Gnosticism. The two words both come from the Greek word 'know', but for different reasons.
The word agnosticism contains the prefix 'a-', which means 'not'. So, an agnostic does not know whether there is a God.
Gnosticism was a major, early branch of Christianity, in which the believers, or Gnostics, sought to 'know' the truth about God, not just to have blind faith. The early Gnostic schools no longer exist, but some believe that the Rosicrucians still follow some of the early Gnostic principles.
Theist - one who believes in God or gods (from Greek theos - god)
Atheist - one who doesn't believe in God (Greek a-without)
Agnostic - kind of a cheat word invented by Huxley for atheists at a time when they were looked down on as immoral. Supposedly one who isn't sure whether there's a God or not. (from Greek gnosis - knowledge)
Monotheistic faith believes in one God, like Judaism and Christianity. Polytheistic religions believe in many deitys, like Hinduism or Roman mythology. An agnostic believes that we do not know whether or not there are any gods.
Theist - Believes in a God or many gods.
Atheist - Does not believe in a God or any gods.
Monotheist - Believes in a singular God.
Polytheist - Believes in numerous gods.
Agnostic - Does not know whether or not a God or gods exist.
Those terms identify three different points of view on the subject of God. An agnostic doesn't know if God exists, an atheist believes that there is no God, and a theist believes in God.
These are fine distinctions, but some philosophers define a range of beliefs: Thiest - certain that god exists. Weak thiest - acknowledges that one can't be certain, but believes. Agnostic - neither believes nor disbelieves. Weak atheist - acknowledges that one can't be certain, but disbelieves. Strong atheist - certain there is no god. As you can see, "weak atheists" hold the middle ground - in fact, most atheists are probably weak atheists - they acknowledge that certainty isn't possible, but it is very unlikely that god actually exists.
Agnostic Atheist
No, she is an agnostic.
An atheist does not believe in God.
Yes, he describes himself as atheist or agnostic.
Probably agnostic/atheist
PewDiePie is an agnostic atheist.
I presume you mean, Richard Branson. He is an atheist.
By definition, all humans are born agnostic atheists
No. Stephen Hawking is an Atheist.
She describes herself as an agnostic.
free thinker, agnostic, nonbeliever