I have a David Cohoon, s/o Joseph Cohoon and Nancy Parr in 1789 in NY. He married a Roxanne who was b in Conn, but I dont even have a maiden name for her. I show them with John b 1828, Emmaline b 1833, Matilda b 1836 and David b 1843, all b in New York, and Pomeria (Emily) b 1845 in Mich. This family info is from the 1850 census Livonia Twp, Wayne Co, Mich. Does this sound right to you?