The Weaver family is found in Fairfield Twp., Tusc. Co. Ohio in the 1850 Census.
The graves are found in the Cemetery book for that township (Vol. IV from the Tusc. Co. Gen. Soc., available for purchase).David and Rachel are found in the Mt. Tabor, St. Matthew's Lutheran, Cemetery. David Weaver: d 13 Jan 1853; 47y10m8d. Rachel J. d/D & L.: 27 Mar 1854, 2y9m12d.
This data is on pg. 123.The cemetery appears to be off of the Taber Ridge Road, NE and approximately 2 miles due south of Somerdale, Ohio.
David does not appear to have married in Tusc. Co.