Research of Kevin Everingham
1860 OH Marriage Record #186, (film 425755),.. Jacob Bowers married Hannah Shirts 8 Mar 1860 at Wooster, Wayne County, Ohio.
1867 OH Birth Record __ Bowers, b.18 Sept 1867 at Nimishillen, Stark Co. OH, father; Jacob Bowers, mother: Hannah Shirt
The above birth record means that it is likely that William D. Bowers was also born in Ohio, not MI. The family likely moved to Michigan some time after 1867.
1870 CENSUS Coe Twp., Isabella County, Michigan (17 June 1870, Page 12 family #95)... Jacob Bowers 55, farmer, b.OH,.. Hannah 35, b.OH,.. Abigail 6, b.MI,.. Olive 4, b.MI,.. William 3, b.MI,.. Sarah? 1, female, b.MI according to the 1870 MI Census, all children were born in Michgian.
There are MANY Jacob Bowers' found in Census data even in Ohio, so they are hard to pinpoint so far.