In the books, if I recall correctly, it
was Vargo Hoat that ordered the Dothraki from the Bloody Mummers to cut off Jaime's hand.
However, in the TV show, I think Hoat has not made an appearance, and neither have the Bloody Mummers. Furthermore, the character that cut off
Jaime's
hand in the TV show is, apparently, named Locke. However, I don't recall if there was such a character in the books.
Who is he?