In Judaism, the two principal names of God are:
1. YHWH (יהוה): This is known as the Tetragrammaton, meaning "four letters." It is considered the most sacred name of God and is often referred to as "The Name." Due to its sanctity, it is generally not pronounced aloud by observant Jews. Instead, it is substituted with *Adonai* (אֲדֹנָי) meaning "Lord."
2. Elohim (אֱלֹהִים): This is a more general term for God, and it can also refer to other deities or powerful beings. It is a plural form, although when referring to the God of Israel, it is understood to be singular.
These two names represent different aspects of God: YHWH is associated with God's mercy and personal relationship with humanity, while Elohim is associated with God's power, justice, and creative force.