Many people would be wrong then. :D
God is not his name, but one of many titles; do you have brothers and sisters? When speaking to them, how would you refer to your --common-- father?
"Dad", right?
Same here, he is God as he is Dad and as he is Christ... He is called "Abba Father". That does not mean it is how he is called...! How is your dad called? :)
Yahweh means "He who was, and is, and will be"; the actual word is lost to us --Yahweh is the closest "guess" from YHWH, the Tetragrammaton... Another one --quite distant-- being Jehovah...
Now, the Hebrew word for "God" is "El", plural "Elohim"; he was named in plural --millennia ago.
"EmmanuEL", for instance, means God among us~, so as you can see it can become a particle inside a word. Also ELyon, which means "God Most High"...
So no, Yahweh is definitely NOT Hebrew for "God", but for "He that is", or "I am that I am", how he called himself before Moses and others.
"Jesus", also, comes from Hebrew "Yahushua"; the "Yah" particle is short for Yahweh. :)