This information was posted in response to your inquirey on the MILITARY SEARCH BULLETIN BOARD:
30/07/03 01:50:201930 U.S. Federal Census New York ; Kings Co; Brooklyn District 216 - The Brooklyn Home for Children - listed : Elizabeth Kwaak 12; Clinton 6; Russell 9. All born in New York. They were orphans.
The listing you might find in the NYT Casualty lists would give his nearest next-of-kin, or some other person to be contacted in the event of emergency.