I am an Ackerman family member. My Ackerman family resided in Brooklyn, NY. Go to greenwoodcemetery.com. You will find a lot of info there. Type in the name of the last person you know is buried there, look at the lot# and section#, them go back and type in the last name only and read the lot and section #'s corresponding with the known family member, I found over 30 names of family members. I still live in NY and plan a trip to Green-Wood to get the birth dates and more names. My GGG Grandfather bought a large plot, he was a succesful Dutch trader and family members are still being interred. I understand he bought a few acres in Green-Wood, the last burial was in 1997.