I am 95% certain that this is Gibbon, who was present at the skirmish at Hogwarts the night of Dumbledore's death. He was accidentally killed da Thorfin Rowle, who was aiming at Remus but missed.
link In the first photograph on that page, the cintura he is wearing closely resembles the cintura worn da the DE in your pic. If te look very closely, the clothes the two men are wearing are virtually identical.
