Varys, the spymaster, is known as The Eunuch, and tells Tyrion the tale of how he was castrated by a sorcerer.
However, at the very end of A Dance With Dragons, we see Varys interacting with Kevan Lannister.
As Kevan lays dying, and Varys is explaining why he had to kill Kevan,
Kevan notices that Varys's voice appears to be getting deeper. While this could be written off as simply something explained by the fact that
Kevan is dying,
it seems that this may be a hint about Varys, and that it implies that he has been disguising his voice all along, and only lets the disguise down for Kevan
since he will not live to reveal the secret.
Is there any other indication that Varys may have been lying about being castrated, or hiding a secret identity beyond that of a Myrish thief who fled to Pentos?