I recently got some info on my grandfather, looks like we are related so I am passing along what little I know. From what I understand, my grandfather (gabriel) died when my mother was 6 and communication with his sister and brother ended:
Rose (mother of:)
1. Gabriel Kupjian (changed name to George Coupian in US) wife Katherine Wigzell, two daughters: Gail and Janice (my mom) see Kings Park High School link http://kingsparkonline.com/MSS-Main-2006-07.htm
info school found states children born in Turkey of Armenian parents (due to war) and emigrated to US in 1911
2. Haig Kupjian: wife Mildred, daughter Marilyn
3. Zubart (the sister) married Panos Mardirosian, had son: Aram Mardirosian who had two children.