Greenwich was settled in 1640 by Robert Feake and Captain Daniel Patrick of Watertown, Massachusetts, who bought the land from the Siwanoy on behalf of the New Haven Colony for 25 English coats. Among the founders was Elizabeth Fones Winthrop Feake, daughter-in-law of John Winthrop, governor of the Massachusetts Bay Colony, and Greenwich Point was long known as Elizabeth's Neck for her and for the 1640 purchase of the point and much of present Old Greenwich. The town was named for Greenwich near London and was declared a township by the Connecticut General Assembly on May 11, 1665.
More about Greenwich
During the Revolution the British captured and sacked the town, but on February 26, 1779, General Israel Putnam made a daring escape and warned Stamford. In 1983 a section of the Mianus River Bridge, which carries Interstate 95 over an estuary, collapsed, killing three people. Greenwich Point, known locally as Tod's Point, was for many years open only to residents and their guests until a lawsuit reached the Connecticut Supreme Court, which ruled in favor of public access, forcing the town to change its beach policy.
Sources
Wikipedia: Greenwich, Connecticut