Tetragrammaton (יהוה)

The four-letter name YHWH — the ineffable Name of the God of Israel; central in Kabbalah and Christian-Hermetic magic.
Tradition: hebrew · Period: Mesha Stele (c. 840 BCE) — earliest extra-biblical attestation
Figures: Yahweh
Sources
Image: Public domain · User:Mormegil · source. Please keep this credit when you use it.