Try Mt Zion and Mt Hebron cemeteries. You can look names up online. Click on "interment search". www.mountzioncemetery.com
(Maspeth NY, Queens)www.mounthebroncemtery.com
(Flushing NY, also Queens)
You will be surprised at the number of Salomon, Stern, Gans surnames that show up in your search. You will find burial dates also and beneficial society information, which might also help you figure out if your people were buried there.