Lefferts Place is named after Peter Lefferts (born in Brooklyn in 1753; died in 1791), who was a delegate to the 1788 New York State Constitutional Convention.
He was a scion of the Lefferts family, which was the biggest slave-owning family in Kings County.
[Photo is of the Lefferts Homestead, now located in Prospect Park, that in old slavery days in Brooklyn was the home of the Lefferts family.)