Lewis & Short

Ĕlĕleus, ei, m., = Ἐλελεύς [from ἐλελεῦ, the cry of the Bacchantes], a surname of Bacchus, Ov. M. 4, 15.
Hence, Ĕlĕlēĭdes = Bacchae, Ov. H. 4, 47.