[Diego1618]

And then, there is also "the General Assembly and the Church of the First Born".

Yes....and many others, but.... the "Church of God" still predates the Catholic Church by a good number of years. It was the original.

[muawiyah]

I was referring to Hebrews 12:23 (Whole Chapter) wherein is contained the expression: " To the general assembly and church of the firstborn, which are written in heaven, and to God the Judge of all, and to the spirits of just men made perfect,...

Pretty obvious this one exited BEFORE any of the others eh?!