I have a Lydia Ann DEMUTH (b. 29 Feb 1840), daughter of Wilhelm Gottlieb DEMUTH (b.19 Oct 1791 in Schoeneck, Lancaster, Pennsylvania - d.28 Jan 1874 in Whitehouse, Lucas, Ohio) and Elizabeth KIND (b.08 Apr 1797 in Lancaster, Pennsylvania - d.21 Jun 1882 in Whitehouse, Lucas, Ohio).
I do not have any more information on Lydia specifically (other than the D.O.B. listed above)~ she is a sister of my 4th great-grandmother, Mary Ann (DEMUTH) HELLER. I have a great deal of information about the DEMUTH and KIND lines going back from Wilhelm Gottlieb and Elizabeth that I can share with you if you find that this is, indeed, your Lydia.