God who is a Spirit (John 4:24) is called YAHWEH or YHWH.
The Bible shows in the "Authorized Version" (AV) still in direct language that God is called JAH, short of YAHWEH; voiced as "JAW".
"Sing unto God, sing praises to His Name: extol Him that rideth upon the heavens by His Name JAH <Strong 3050>, and rejoice before Him.", Psalms 68:4.
Unfortunately other Bibles don't use God's Name, but instead use "LORD" which is a forgery and no name of course:
"Sing to God, sing praises to his name; lift up a song to him who rides through the deserts; his name is the LORD; exult before him", ESV
Or even worse: by using the forged name jehovah (KJ21):
"Sing unto God, sing praises to His name! Extol Him that rideth upon the heavens by His name Jehovah; and rejoice before Him".
Mr. Strong has been wrong and shortsighted here, for he refers Strong 03050 by the name JAH, pronounced JAW, to Strong 03068 which he has translated as "Yeh-ho-vah", while he can see that JAH never shortens to Jeh. And yet he calls JAH an abbreviation of Jehovah. Also a contraction of "J and ending ah" is not possible, because that would lead to Jah written, but not with the pronunciation JAW, because Jeh-ho-vah ends with the "ah" sound. Manipulation and stupidity.
YAHWEH is the name of GOD, short YAH, pronounced JAW, short of pronounced YAWWEH.
Jehovah's Witnesses do not testify of the one true God YAHWEH from the Bible, which also makes sense when you realize that Christians are witnesses of Christ. Moreover, whoever does not bear witness to Christ (as Lord of God; Romans 10:9) does not have/know God (John 5:23+Acts 4:10-12) who sent us Christ (John 17:3). The JWs Church was founded by Freemason CT Russell; and the "god" of Freemasonry is the fallen lucifer; the devil. And they will honor neither Christ nor God by their true names. Hence their fake name jhvh or full jehovah for God. And they also do not know / use the true name of Christ: Yeshua. Also they deny him as the son of God and as the Lord of God; to them he is only an "important witness".
Don't be fooled and choose personal and real instead of churches/worldly organizations or "trying to belong to". Real Christians are "set apart" and therefore don't belong anywhere!
Read more about God, Christ & Eternal Life: Eternal life after this life