(Λασθένεια), a native of Mantineia, in Arcadia, mentioned by Iamblichus (Vit. Pyth. 36) as a follower of Pythagoras. Diogenes Laertius (3.46, 4.2), on the other hand, speaks of her as a disciple of the Platonic philosophy, which is confirmed by other authorities. (Clemens Alex. Strom. iv. p. 619; Athen. 12.546, vii. p. 279.)
[C.P.M]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