The migration history of my Guy & Maxwell families is very similar to what you have outlined;

Solomon Maxwell (1780 in area of NC that became Bedford Co, TN-1852 Perry Co, IL) married Mrs Elizabeth White (MNU) she also died in Perry Co, IL.

I only have 2 of their children at present time, Mary & My GG-GM, Charity Ann (1825 Bedford Co, TN - abt 1870 in IL) she married James R Guy (1816 Allen Co, KY-1867 Washington Co, IL)

They had a lot of children, all of whom were born in Washington Co, IL, many of them died in KS.
But my G-GM, Emma Jemima Guy (1857 Washington Co, IL - 1929 Jasper Co, MO) married James Franklin Howell (I think they were married in IL?) and he also died in MO.

Many of the siblings of Solomon Maxwell also moved during the early 1800s to IL. I do not have info on their offspring, so I do not know if any of them moved onto MO, but as that seems to be a common migration pattern it is feasible.

How far back to you track your Maxwell family? The father of my Solomon is believed to be Thomas Maxwell (1750-55 VA - aft 1830 Census in Bedford Co, TN)

Thomas' father is believed to be Solomon Maxwell (born abt 1725 unknown - abt 1770 VA.)

I have not researched this far back into my Maxwell line and have this info as a guide from another researcher's notes only.
I have really just begun to research this branch of my family.

Does any of this sound familar?

Carrie