High Quality Content by WIKIPEDIA articles! Jah is the shortened name for God YHWH, and Jehovah most commonly used in the Rastafari movement and the world wide preaching of Jehovah's Witnesses in upwards of 500 languages. It comes from the Hebrew.Jah is often used as a shortened form of the Tetragrammaton. The Tetragrammaton is often translated (especially in older English versions of the Bible) by use of the term "LORD," and the word "Hallelujah" by the phrase "Praise ye the LORD". Thus, partially translated and partially transliterated, the term could be rendered "Praise Jah."