There must be at least two Lucy Greene's living in Caanan born about 1806. My Lucy married Samuel Knickerbocker in the mid to late 1820s. The last child I have with him is in 1837. Her husband must have died early, and definitely before 1850. Her youngest daughter, born 1837, is adopted by her sister. In the 1870s, the families have moved to Dutchess, NY. They eventually settle in Massachusetts, Lucy still under the Knickerbocker name, where she dies in 1888. Her parents were Joseph and Clara Greene, according to her death record.
Her sister, Betsey Ann Greene, married Herman Chatfield, and died in 1879.