Mnachem (Mendel) HaKohen Risikoff (1866–1960), was an orthodox rabbi in Russia and the United States, and a prolific author of scholarly works, written in Hebrew. Risikoff used a highly stylized and symbolic pen-name, יאמהדנונחהים, made up of the Hebrew letters of his first name, the Hebrew word for Lord, and the Tetragrammaton, one ...