Jehovah in the original was not even in the Old testament as it was never a word till 1533 there was no lettter J till the early 15th centry. And it was never in the New Testament as it was not a Greek word.
However theos Greek for God was Used in the New Testament . By the way this is the same word used in Hebrews 1:8 referring to Jesus or the Son as theos God.