No one doubts Jesus extensively spoke about God’s Kingdom because he said: “I must proclaim the good news of the kingdom of God to the other towns also, because that is why I was sent.” (Luke 4:43) Yet Christian sects are divided over the subject whether Jesus used God’s name or not.
It is said that God’s name Jehovah was revealed to Moses. However Jesus knew Moses was not trustworthy. (Mathew 19:8) Moses born and brought up in Egypt could have been influenced by Egyptian knowledge. In Egyptian, “yah” is the moon god and “wah” means “increasing or growing.” Yah + wah = growing Moon. Yahweh/Yah-wah could then be a lunar form of the Great Mother goddess in which the “growing” represents her in her pregnant aspect. Thus knowing the root of Yah, Jesus chose to call God as “our heavenly Father.” (Mathew 6:9)
Most well-known English versions of the Hebrew Bible translate the Hebrew "Hallelujah" (as at Psalm 150:1) as "Praise Yah" or “Praise Lord” But JWs have no doubt, hence translate as “Praise Jah!” and puts in foot note: ‘“Jah” is a shortened form of the name Jehovah.’ (Psalm 150:1)