The word Jehovah never appears in the NT. The WTS felt it needed to make the OT and NT consistent on the use of this word, so include Jehovah in the NT in the NWT bible, rather than understand why Jesus did not use the word Jehovah
When I showed my wife in the Kingdom Interlinear that the Greek word translated Jehovah was the same as the Greek word for Lord she couldn't deny that the WTS is guilty of changing the scriptures to suit thier purpose. I suppose you cant get a copy of the Kingdom Interlenear any longer?