The connection between William Vancil and the Tourneys is that his wife Mary is a Tourney.Also Joseph is Mary's brother and their father was Jean Baptiste Tournier; he went by John B Tourney in the US.
The connection between Zachariah Lierle and William Vancil is that they are 1st cousins.The Zachariah Lierly that you referred to at the beginning as being a Revolutionary War Veteran was their grandfather.William's mother was Susanna Catherine Lyerly and she married Martin Vancil.The younger Zachariah's father was William Albert Lierle.It is hard to keep track of the older Zachariah's descendants since he had children with 5 women, 4 he was married to.
You are correct that Zachariah's wife had died and the connection between the Lierles and the Tourneys is that Zachariah's 2nd wife was Joseph and Mary Tourney's half sister Apolena Tourney.These are my fiancee's 3rd great grandparents.They are buried in Hill Cemetery in Daviess County, Mo.
The George Tourney you also have listed is the full-sibling of Mary and Joseph.George was married 3 times.Jean Baptiste Tournier had 3 children with his first wife while in France and he then married Marie Catherine Ballot in Stark County, Ohio before coming to Adams County, Illinois and having 9 children with her.Actually the first 3 of 9 were born in Ohio.
The Peter Tourney that married Isabella Culp wasn't really a Tourney.He was a Moulin.He was the only child of Marie Catherine Ballot and her first husband Nicholas Moulin.He did get married as a Tourney but was a Moulin in the following 1860 census, and in 1870 and 1880.
The Franklin Tourney you referred to is the full-sibling of Apolena and most of the children by Jean's 2nd marriage moved to Daviess County, Missouri.
As far as I can tell there is no relationship between the Tournear guard and these Tourniers.Jean's father died in France and as far as I know he was buried there.I guess the guard could have been an uncle or older cousin of Jean Baptiste.
There are many variations of the Tourney name.Most often used today is Tourney, but there are some Tournears.I haven't seen anyone still using the Tournier version and some have also gone by Turney.