found: GeoNames, algorithmically matched, 2009(ppl; 38°53ʹ32ʺN 089°24ʹ47ʺW)
found: Wikipedia, August 28, 2019(Greenville, Illinois; city in Bond County, Illinois; county seat of Bond County; founded by George Davidson in 1815 in what was then the Illinois Territory in what was then still part of Madison County; incorporated as a town in 1855 and as a city in 1872; became the county seat of Bond County in 1821; 38°53ʹN 89°24ʹW (38.8895, -89.4036))
found: Greenville, Illinois website, August 28, 2019:home page (Greenville, Illinois; City of Greenville; Municipal Building, 404 S. Third Street, Greenville, Illinois)