It might be easier looking for a particular person than trying to find the surname in a cemetery. Spellings of that name also had changed: Osburn, Osbourn, etc. Sometimes correctly, or sometimes how a census taker spelled it.
Find-a-grave does not show that cemetery.
The Bureau of Land Management has a database of land patents issued under the Homestead Act:http://www.glorecords.blm.gov/search/default.aspx
It shows 12 pages of Osborn's obtaining land in Illinois, but none in Wabash County. It shows Miller's obtaining land, but no John. No Joy's obtained land.
The 1870 census has a Catharine, about 1812; Jackson, about 1830; and Sarah Osborn, about 1855, in Wabash, Wabash County. In 1870, Ephriam Joy was living in Bridgeport, Lawrence Co, IL, born about 1820. In 1840, a Sarah Joy was in Wabash, with one male 20-30, and two females 15-20. The 1840 has James Miller/5 in family, Barton Miller/8, Frederick/4, Louis Miller/5, and Valentine Miller/6. In 1830 on Barton and Frederick. In 1830, Sarah Joy/
This article: "Pioneers of Wabash County," had none of the names, but interesting: https://archive.org/details/jstor-40194561
A Bishop Osborne formed a methodist church council there in 1908https://ia801605.us.archive.org/15/items/jstor-40186948/4018...
Here find a William Osborn that farmed in Wabash County for a spell:https://books.google.com/books?id=Ox84AQAAMAAJ&pg=PA685&...