I have absolutely no proof that my Mary Jane is the daughter of Reynolds & Jemima, but she was born in 1825. She married Chauncey Dunn in the Lee area 29 Dec 1847. Their first son was Jeremiah (likely named for Chauncey's father), born 1849. Their second son was born in 1852. He was Reynolds J Dunn. Possibly Reynolds Johnson Dunn? He died in 1856 and was buried in Lee Valley Cemetery along with Mary Jane. Their last child that I've found was a daughter, Valeria, born in 1854. I'm descended from Jeremiah.
Mary Jane died in 1863 in Constantia, Oswego County. I'm assuming her father was Reynolds based on her second son's name, and the fact that there actually was a Reynolds who could have been her father. It's a complete assumption, though, unfortunately.