The US show had named the assassin Jonathan Matijevic, who took on the identity of photographer Martin Belkin. The character's Indian counterpart, though, did not have a real name, as the credits suggested.
I'm not sure if he can be brought back, since the ATU knows that the real Max Ferraro is dead, and the one posing as Max Ferraro is an impostor. Yes, he was rather creepy, but somehow, after his attempt at assassinating Aditya failed, he seemed to have lost his touch, eventually using improvised death traps, and then, using a close-range carbine, and killing with two shots up close.