The original pronunciation for YHWH is debated, although the current scholarly consensus is Yahweh. In the New Testament, the divine name is remarkably absent. Since the NT was written in Greek, the writer had to choose whether to retain the Hebrew letters, translate them, or transliterate them. The New Testament follows the custom set by the Septuagint of translating the name as Kurios , which means Lord. However, there are some ancient versions of the Septuagint and NT which have the four Hebrew letters.
Today there are different attitudes towards the name.
Most Christians are largely unaware of it. Some groups emphasize the name as Yahweh or Jehovah, and speak it freely. Some have no objection to using it, but seldom do. Some insist on preserving the tradition and not pronouncing it. God then here is giving a play on words.