Hi Donna,
 
We who believe that the Bible is the Word of the one true God need to know the name of the One we worship.   This distinguishes Him from all others.
 
In the Old Testament every time you see the word LORD  in capital letters, the Hebrew word is YHWH.   This is the name of our God.   The word "God" is a title, not His name.   He tells us over and over and over what His name is.   Here are just 4 examples:
 
Exodus 3:15    "...YHWH God of your fathers, the God of Abraham, the God of Isaac, and the God of Jacob, hath sent me unto you; this is my name forever..."
 
Exodus 20:7  "Thou shalt not take the name of YHWH thy God in vain..."
 
Isaiah 42:8 " I am YHWH  that is my name..."
 
Jeremiah 16:21  "...and they shall know that my name is YHWH"
 
Read your Old Testament and you will see that His name is YHWH and He distinguishes Himself as the Creator, the one true God and set apart from all other gods. He is holy which means "set apart" for He is set apart from all creation and from all other gods that people worship.
 
(YHWH is a form of the verb "to be" and so it speaks of His eternal existance.  His Name is not pronounced by most Jews.  Some people pronounce it Yahweh.  Some English speakers change it to Jehovah)
 
The Moslems worship Allah which is a title and this is not the name of our God.
 
We worship YHWH the God of Abraham, Isaac and Jacob, the God of Israel; and the Messiah is Yeshua, Son of the one true God.
 
Only those who follow the Tenach and Brit Chadashah  (Old and New Testament) worship YHWH.   All other religions worship other gods.
 
I hope this helps in some way to answer at least one of your questions.
 
Shalom,
 
Roberta.