Most English Bibles, including those which contain Yahweh (such as the Jerusalem Bible) or a related form in the Old Testament, do not use the same form in the New Testament because it does not appear in the available Greek New Testament manuscripts. However, of over English translations of the Bible have been written, 23 use the forms Jehovah or Yahweh in the New Testament.

Is it true that does the word jehovah appear in the new testament?
yes