Jahvism

from The Collaborative International Dictionary of English v.0.48

Yahwism \Yah"wism\, n. Also Jahvism \Jah"vism\
   1. The religion or worship of Yahweh (Jehovah), or the system
      of doctrines, etc., connected with it.
      [Webster 1913 Suppl.]

   2. Use of Yahweh as a name of God.
      [Webster 1913 Suppl.] Jehovist
      Jahwist
      Jahvist