Boerum Hill is named for the colonial farm of the Boerum family, which occupied most of the area during early Dutch settlement. Most of the housing consists of three-story row houses built between 1840 and 1870. Despite the "hill" in the name, the neighborhood is relatively flat; some parts sit atop former marshes that bordered Gowanus Creek. In the 1950s, all the neighborhoods south of Atlantic Avenue and west of Prospect Park were known generically as South Brooklyn. Boerum Hill in particular was sometimes called "North Gowanus." The name "Boerum Hill" was coined in early 1964 by Boerum Hill Association founder Helen Buckler, referencing the name of the colonial farmers.