The 83-year-old homeless man who was brutally murdered in predawn ramage in Chinatown has been identified, according to police sources.

Cheun Kok, 83, was beaten to death with a heavy metal bar just before 2 a.m. Saturday as he slept on cardboard bedding at the intersection of Bowery and Doyers streets, police and sources said.

Rodriguez “Randy” Santos — who has a history of violence, according to police — has been charged in the senseless attacks that left three others dead and another critical.

The maniac, who is also homeless, is accused of repeatedly hitting the homeless men in the head with the 3-foot bar, cops said.

Santos was expected to be arraigned on murder and assault charges Sunday.

A 49-year-old who miraculously survived the beating was at NewYork-Presbyterian/Weill Cornell Medical Center, where he was still critical Sunday.

His name has not been released.

Detectives hope to question the man when he is healthy enough, Deputy Chief Michael Baldassano said Saturday.