1840 Alexander Co. IL
William Hansucker and family
Born: 1805, Greenville, Muhlenberg, KY
Died: June 1843, Alexander Co. IL
which contains info about his parents and siblings.
Alexander County didn't start to record deaths until 1878. However they do have land and probate records starting 1818 and 1819.
I'd look for his newspaper death notice at Illinois Digital Newspaper Collections, https://idnc.library.illinois.edu/
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