Who is God?

According to the Bible at Psalms 83:18 it shows us who God really is. “May people know that you, whose name is Jehovah, you alone are the Most High over all the earth.”
I will send you more scriptures to identify who God is:
  
 “I am Jehovah. That is my name; I give my glory to no one else, nor my praise to graven images.”

Isaiah 42:8

“Everyone who calls on the name of Jehovah will be saved.”

Romans 10:13

“Of course, every house is constructed by someone, but the one who constructed all things is God.”

Hebrews 3:4

“Lift up your eyes to heaven and see. Who has created these things? It is the One who brings out their army by number; he calls them all by name. Because of his vast dynamic energy and his awe-inspiring power, not one of them is missing.”

Isaiah 40:26

Please read this article entitled Who is Jehovah? https://wol.jw.org/en/wol/library/r1/lp-e/all-publications/watchtower/the-watchtower-1998/may-1
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(Psalm 8:1) 8 O Jehovah our Lord, how majestic your name is throughout the earth; You have set your splendor even higher than the heavens!

(Psalm 83:18) 18 May people know that you, whose name is Jehovah, You alone are the Most High over all the earth.

(Isaiah 24:15) 15 That is why they will glorify Jehovah in the region of light; In the islands of the sea they will glorify the name of Jehovah the God of Israel.

(Isaiah 45:3)  3 I will give you the treasures in the darkness And the hidden treasures in the concealed places, So that you may know that I am Jehovah, The God of Israel, who is calling you by your name.

(Isaiah 60:9) . . .To the name of Jehovah your God and to the Holy One of Israel, For he will glorify you.

(Daniel 9:4) . . .“O Jehovah the true God, the great and awe-inspiring One, who keeps his covenant and shows loyal love to those who love him and keep his commandments,

(Mark 12:29, 30) 29 Jesus answered: “The first is, ‘Hear, O Israel, Jehovah our God is one Jehovah, 30 and you must love Jehovah your God with your whole heart and with your whole soul and with your whole mind and with your whole strength.’

(Matthew 4:10) . . .For it is written: ‘It is Jehovah your God you must worship, and it is to him alone you must render sacred service.’”
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(1 Corinthians 8:5, 6) For even though there are so-called gods, whether in heaven or on earth, just as there are many “gods” and many “lords,” 6 there is actually to us one God, the Father, from whom all things are and we for him; and there is one Lord, Jesus Christ, through whom all things are and we through him.

Jesus is God

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Jesus
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Here is the truth: The Lord Jesus Christ is God. Nobody can be good enough to avoid hell. The truth is that death leads to immediate heaven or hell, depending only on whether the person believed on the Lord Jesus Christ, or not. The truth is that the Lord Jesus Christ loves you and wants to bless your life freely :) Most of all, Jesus wants you with Him forever, and not in hell. It is too late to be saved, after death.
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Believing on the Lord Jesus Christ means being forgiven all sins past and future and means going to heaven. The truth is that every belief except one will lead to eternal torment in the lake of fire for every person. Because nothing pays for our sins except the death and blood of Jesus, the sacrifice of Jesus that is already accomplished by Him . Jesus loves you! The truth is that the Lord Jesus Christ is God, and Jesus died on the cross to pay for all of our sins in full, and then Jesus was buried, and then Jesus resurrected from the dead. Nothing else pays for our sins, not works, not deeds, not religions. So the only way to heaven and to avoid hell, is by believing on Jesus for eternal life (John 6:47), without adding any of your own works (Romans 4:5). Believe in the Lord Jesus Christ to take you to heaven, and you will be in heaven, no matter what, guaranteed. That easy, thanks to Jesus! Tell Jesus that you thank Him that you will be with Him in heaven

Jehovah is God. Jehovah is the Almighty God and Jesus Christ is a Mighty God. they are not one and the same and Jesus is not Jehovah incarnate as the mormon's keep saying. Jehovah did not created evil. the devil did. read psalms 83 verse 18 in the king james bible. not one place does Jesus say he is God. Jesus prayed to his Father and said he can not do anything without the Father in heaven. when Jesus was baptized, Jehovah came down like a dove and said This is MY SON THE BELOVED

The Supreme Being, the Creator, the Uncreated.

Here is a direct answer to your question. Straight from the Qur'an:

GOD - there is no deity save Him, the Ever-Living, the Self-Subsistent Fount of All Being. Neither slumber overtakes Him, nor sleep. His is all that is in the heavens and all that is on earth. Who is there that could intercede with Him, unless it be by His leave? He knows all that lies open before men and all that is hidden from them, whereas they cannot attain to aught of His knowledge save that which He wills [them to attain]. His eternal power overspreads the heavens and the earth, and their upholding wearies Him not. And he alone is truly exalted, tremendous.
Quran 2:255

All gods were invented by man. There have been many gods through the history of mankind.

God is the creator of universe, earth, all creatures including human beings and spirits. God is an ever existing eternal supreme being. All human beings are created beings. (The word 'created' is self-explanatory.) That doesn't comes under natural way of life. Humans are not natural but unnatural beings. I mean humans are just robots made of flesh and bones. There may be several eternal beings which knew neither death nor birth and God must be the chief of these eternal beings. IN FACT THIS IS THE REAL EVER EXISTING PHENOMENON. Human beings can think only like human beings. Their thoughts and intelligence are limited. To know and discover more they must come out of what religions and people have created in their minds and think freely and independently.

'Who', is a projection of man's idea pertaining to "personhood".  God is better understood as a 'what', rather than a 'who'.  To understand that, you have to understand 'what God it not'.  

God is referred to (by some) as the "Big Banger" who caused the "Big Bang". 

L O V E ........

He/She is the Creator, but more than that is unanswerable, because as John says in one of his wonderful apocryphal texts, nothing exists outside God to describe Him/Her.

God is the one who created good and evil. He is the one that chooses good. He created all works of life. We are like him. We are his image. But he is prefect. We are not. We need him He does not need us. For we die and He is everlasting life. We must follow him so we too may have everlasting life.
God promise the Hebrews that he will send a messiah to help israel.  But he knew Israel would reject their Messiah. So God came as Jesus to save his people. God was not going to send anyone to die for him. He came himself. 

since your asking for a name I can only give you one, JESUS, The Only begotten Son of the Most High God, He was God ( in the form of a spirit ) before He came to earth in the form of a man, the Other God your asking about ( of importance ) has NO name and that should stand to reason if you understand how anyone gets a name, this other God is known as Our Heavenly Father, He has no name because there was no one before Him that could name Him, the ONE ( the only ONE ) He made, made everyone and every thing else that was made, the One that made us, we call Him Lord, that would be Jesus in case you haven't heard, Jesus is Lord, Jesus is Yahweh, Jesus is Jehovah, Jesus is the Messiah, Jesus is the Almighty God, Jesus is ALL the titles given to the old testament God that people can't understand because there was no name for this God at that time, this God said to not put any other God's before Him, WHY? because ALL authority was given to Him over mankind, given by whom? The Most High God=Our Heavenly Father, that shouldn't be so hard to understand