Yah
1:
YAH. A contraction (Ps. 68:4, marg.) for Jehovah (see [The] Lord; Yahweh). Yah also enters into the composition of many Heb. names, such as Adonijah, Isaiah, etc. The KJV renders it Jah.
Unger, M. F., Harrison, R. K., Vos, H. F., Barber, C. J., & Unger, M. F. (1988). The new Unger's Bible dictionary. Revision of: Unger's Bible dictionary. 3rd ed. c1966. (Rev. and updated ed.). Chicago: Moody Press.