Quashawan

She became Grand Sachem of the Montauk after Wyandanch’s death. The Easthampton Library has a document dated in 1663 Quashawam Treaty. This treaty, negotiated between the Montauk and Shinnecock, and overseen by the Easthamptoners is signed by Quashawam, Grand Sachem of the Montauk.

From http://easthamptonlibrary.org/wp-content/files/pdfs/history/lecture...

Cockenoe, one of the first Long Island Indians to become fluent in English, very likely played an important role in developing Wyandanch’s accommodationist policy with the English. He remained one of WyandanchÆs closest advisors until the Montaukett sachem’s death in 1659. Cockenoe strengthened his relationship with the Montauketts when he married Wyandanch’s sister (RTEH 1:261). His familiarity with the English language and customs enabled him to play an important role as a diplomatic liaison between the two cultures. He also benefited materially from his English connections. The colonial documents indicate that Cockenoe was paid for his work as an interpreter, and for such services as marking out the boundaries for deeds and tending the grazing lands on Montauk (Tooker 1980, 183-84; RTEH 2:109-111).