Thomas Adams and Margaret McDonnell were my grx2 grandparents.From the details in your posting, I am certain that we are researching the same folks? and would love to share information?
My connection is as follows:
Daughter of Thomas & Margaret, Bridget Minerva "Minnie" Adams married Thomas Dorr Byington, son of Randall Byington and Mary Scott.
Daughter of Minnie and Thomas Byington, Winifred Helen Byington married Francis Benjamin Drolet, son of Alfred A. Drolet and Lucy Kane.
Son of Winifred and Francis Drolet, Louis P. Drolet married Donna Jones.They are my parents.
Winifred was born in Paris, Green Twp., Mecosta Co. in 1898 and, differing from your info, I have Thomas and Margaret living there in the 1880s, along with a son William P. Adams?However, the family was clearly connected to the Kalamazoo/Galesburg/Augusta/Richland area and still is.