>>>Paul, technically, I believe the area just immediately SOUTH and EAST of the Newkirk is referred to
as South Greenfield (besides the classy residential area of Ditmas Park that lies within). <<<
Older maps from the late 1800s show South Greenfield as a small town along the RR. At this point Flatbush was mostly farms with small villages scattered along main routes like what would become Flatbush Ave and Kings Highway.
Today, a reminder of S. Greenfield are a set of streets that don't follow the grid and are named for trees, like Locust, Cedar, Chestnut, etc. I suppose when they cut the newer streets through, the property owners along these streets wouldn't budge and so Brooklyn was built around them. Shades of early 20th Century NIMBYism!
My question is, where was Greenfield, if there was a South Greenfield?
www.forgotten-ny.com