There are many names given to the divine. Some of the names are used in approximately the same sense (e.g., when a Catholic uses both "God" and "the Holy Trinity"), but for the most part, the names mark important differences in meaning. Positivists (e.g., advocates of Logical empiricism) should take note that a robust theory of the meaning of Religious Language, however dismissive, ought to be able to account, in some fashion, for these differences in meaning. Among the names used, or ways to refer to the divine, are the following; there are both generic words given for the divine being(s), as well as specific names (used by analogy to names for particular individuals or things) for the divine used in particular religions.
Names for specific conceptions of god: Yahweh, Jehovah, Jesus Christ, the Holy Trinity, The Godhead, Him, He who is called "I am," Allah, Krishna, Buddha; then there are the many names for the many different gods of polytheistic religions, e.g., Zeus, Jupiter, Odin, and Siva. In old persia the name of the sun god was shamash (or sha.mash). According to the old sources his sister "Ishtar" (AKA "Ianna" or "Inanna") represented the goddess of the moon. In some narrations the both of them were mixed up, so Ishtar was the goddess of the sun and shamash was the god of the moon. Shamash -being the sun god- was the first to be pictured with a sort of corona. In a later time the christian religion adapted this kind of image when the holy saints got their halo.
[Please add to this list, and if you feel ambitious, give a brief gloss on each. Although, this could be dangerous. There's an old Superstition that the world will end if ever all the names of G-d are written down.] (cf. the short story by Arthur C. Clarke, The Nine Billion Names of God)