The Rumanchenank were a Lenape people who inhabited the region radiating from Palisades in New York and New Jersey at the time of European colonialization in the 17th century. Settlers to the provincial colony of New Netherland called them the Haverstroo meaning oat straw, which became Haverstraw in English, and still used to describe part of their territory. In 1664 after the supremacy of the English, the Rumanchenank were absorbed by the Tappans. Some Rumachenanck may have become part of the Ramapough Mountain Indians.