Hebrew names of God: Yahweh, Yahu, Yah
On the assumption that a and e are the correct vowels, Yahweh is a name of God in the Hebrew language. Yahu is a well-attested short form of the full or extended name Yahweh. The short form Jah/Yah, which appears in Exodus 15:2 and 17:16, Psalm 89:9, Song of Songs 8:6, is preserved also in theophoric names such as Elijah ("my god is Jah"), Malchijah ("my king is Jah"), and Adonijah ("my lord is Jah"), etc. as well as in the phrase Hallelujah. The name "Joel" is derived from combining the word Jah with the word El.
While pronouncing the Tetragrammaton is forbidden for Jews, articulating "Jah"/"Yah" is allowed, but is usually confined to prayer and study.