I was able to find a Charles Clayton DEMERRITT born 11 FEB 1877, Rumford, Oxford, Maine. at familysearch.orgThey have listed his parents Frank E. Demeritt and Rose Knight. Frank being born 25 AUG 1846 of Peru, Oxford, Maine.
In my own personal research I have a Frank born abt. 1847 in Maine to James Madison Demeritt and Mariah Caldwell.