The father of James the Less, the apostle and writer of the epistle (Matt. 10:3; Mark 3:18; Luke 6:15; Acts 1:13), and the husband of Mary (John 19:25). The Hebrew form of this name is Cleopas, or Clopas (q.v.).
M.G. Easton M.A., D.D., Illustrated Bible Dictionary, Third Edition