That cemetery is in www.findagrave.com/
but no Leake/Leeke burials are recorded there. Also I did a Google search and didn't find any contact info for the cemetery.
I'd contact the Noble County Chapter of OGS, https://noblecountyogs.org/__trashed-5/
who has cemetery info. They might have an inventory.
Do you have their death notices which might say where they were buried? If not the Rutherford P. Hayes Presidential Library has death notices and obituaries in Ohio starting in the 1810s. Successful Searching!