I'm researching a new line on my wife's family tree, her great-great grandmother Elizabeth Markoni Lueckenhoff. I see from the 1850 census in Missouri that she was the daughter of Henry & Gertrude Markoni (although the spelling on that census shows "Markony") and she had three siblings, Maria, Francis and Catherine.

I'm finding a listing for a Frank Markoni, born in Missouri in the Sutter County 1880 census and again in 1900. He's listed as single and as a shoemaker or cobbler. I also see him coming up on the voter rolls, as well as a Henry Markoni born around 1804. I'm guessing these are my wife's 3rd great grandfather and the son, Francis.

Any death records or other census records for any Markoni family members that anyone's aware of?