Lewis & Short

Sĭpylus, i, m., = Σίπυλος.

  1. I. A mountain on the frontiers of Lydia and Phrygia, on which Niobe was changed into stone, the modern Manisa Dagh, Prop. 2, 20 (3, 13), 8; Ov. M. 6, 149; Cic. Q. Fr. 2, 11, 3; Sen. Herc. Oet. 184; id. Agam. 374.
    Hence, Sĭpylē-us, a, um, adj., of Sipylus: genitrix Sipylea, i. e. Niobe, Stat. S. 5, 1, 33; also called Sipyleïa cautes, Aus. Epit. 27.
    Sĭpylen-sis, e: mater deorum, Ulp. Fragm. 22, 6.
  2. II. A son of Niobe, Ov. M. 6, 231.