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Ohio County Marriages
Ohio Marriages
Ohio Deaths
Don't worry about the spelling, just put in Gyer, and it will find alternatives for you.
There is a marriage indexed for Samuel H. Gier and Maggie "Body" on July 29, 1881 in Definance Ohio
There are several marriages for children of Samuel Gyer and Margaret Boday in Seneca County Ohio. It looks like Ellen married several times.
In the Ohio deaths, there is one for Ellen, and one for a Samuel Geyer who died in 1927 in Seneca Ohio, who may be the correct one.
It looks like Margaret and Samuel may have separated, or Samuel died. In 1900 Margaret is remarried
1900 Census for Noble Township, Definance County, Ohio
William F. Cartney, age 50
Margaret E. Cartney, age 48
Florence V. Cartney, age 4
Nellie M. Gyer, age 13, Step daughter
Vidia Gyer, age 9, step daughter
There is also a Samuel Geyer of the right age in the census, listed as single.
Have fun searching!