The story
From Jehovah, the personal name of God in the Hebrew Scriptures; the name was adopted in 1931 and inspired by the Biblical verse of Isaiah 43:10: You are my witnesses.
Etymology from Wiktionary, CC BY-SA 4.0.
Jehovah's Witnesses
Today it means: A monotheistic and nontrinitarian Restoration Christian denomination founded by Charles Taze Russell in 1879 as a small Bible study group. Full definition →