(Σπερχειός), a Thessalian rivergod, became the father of Menesthius by Polydora, the daughter of Peleus. (Hom. Il. 16.174, 23.142; Apollod. 3.14.4; Paus. 1.37.2; Hdt. 7.198).
[L.S]A Dictionary of Greek and Roman biography and mythology
Smith, William
A Dictionary of Greek and Roman biography and mythology. William Smith, LLD, ed. 1890