Isidas
Isidas (Greek: Ἰσίδας) or Isadas (Greek: Ἰσαδας), son of the Spartan general Phoebidas, was a Spartan youth of remarkable beauty and stature celebrated for two feats of courage, both of which involved him fighting naked against the Thebans.
However, since both feats occurred eight years apart, if in both cases it was the same Isidas then in one case he would have been in his puberty and in the other in his late teens or early twenties.
The British painter Sir Charles Lock Eastlake made a painting of the scene for the Duke of Devonshire, entitled The Spartan Isidas or The Spartan Isadas at the Siege of Thebes (c. 1827), which hangs at Chatsworth House in England.