Here's the revealing classic lexical definition that sets the pace for the rest of your book of faith...
رب العلمين = “rabbi alAAalameena”
“rabbi alAAalameena” definition:
The Lord of the jinn, or genii, and of mankind: the Lord of all created beings.
It comes from the root “alama”, which means to mark, sign, and distinguish. He knew it; or he was, or became, acquainted with it; or he knew it truly, or certainly. He knew a thing intuitively and inferentially. He marked it. He, a man, had a fissure in his upper lip; or in one of its two sides. Knowledge.
References:
An Arabic-English Lexicon, E.W. Lane, volume five, pp. 2138 - 2142
The Dictionary of the Holy Qur’an, 1st edition, Abdul Mannan Omar pp. 383 - 385
Occurrences of “rabbi alAAalameena” in the Koran: 34
Locations: 1.2, 5.28, 6.45, 6.162, 7.54, 7.61, 7.67, 7.104, 10.10, 10.37, 26.16, 26.23, 26.77, 26.98, 26.109, 26.127, 26.145, 26.164, 26.180, 26.192, 27.8, 27.44, 28.30, 32.2, 37.182, 39.75, 40.64, 40.65, 41.9, 43.46, 45.36, 56.80, 59.16, 69.43, 81.29
Thus, the ancient (and apparently forgotten!) primary meaning pertains to your god "allah" as emanating from the god satan - as we already acknowledge that satan (iblis), is the leader of the demonic jinns - so is he also referenced quite plainly as your god "allah", as well.
This really comes as no great surprise to Christians, as all throughout the Koran, the "allah" of the Koran is frantically attempting to cloak himself with the Biblical deity previously ascribed unto the Biblical Lord Jesus Christ.
It must, however, cut Muslims to the heart...