I have two separate pieces of information that might help you. First from the 1880 IA census: David Merriott age 44 b. OH (calc yob=1836) wife Mary J. age 42 b. IA son Andrew age 13 b. IA daughter May age 9 b. IA son Harley age 3 b. IA
Then we have a little notebook found in the possession of Joel L. Merriott in Dickenson Co IA listing his brothers and sisters: Brother William b. 6 Feb 1826 age 70 in 1896 Brother David b. 14 Jun 1831 age 65 yrs in 1896 Sister Martha b. 26 Sep 1841 age 55 yrs in 1896
If anyone can confirm these are the same David Merriott or can make any connection to Joel L. Merriott b. NY, moved early to MI and finally to Iowa, please contact me at firstname.lastname@example.org.I have much info on this line.