Jareth \j(a)-re-th\ as a boy's name is pronounced JARE-eth. It is of American origin. Blend of Jar- or Jer- and Gareth, or a variant of Jarah. Jareth has 2 variant forms: Jarreth and Jereth. Baby names that sound like Jareth are Jarett, Jarrett, Jarret, Jared and Jerett.