You can find more on this family by using the free search tool at: https://familysearch.org/ Happy Hunting
Some examples below, more on that site:
Michigan, Births, 1867-1902
https://familysearch.org/pal:/MM9.1.1/NQ8F-M4F
Oscar Dubay
birth 29 Mar 1887 Erin, Macomb, Michigan
father William Dubay birthplace: Michigan
mother Magdelena Dubay birthplace: Germany
U S Census, 1900 ED 51 Chesterfield township, East Precinct New Baltimore village, Macomb, MI
https://familysearch.org/pal:/MM9.1.1/MS97-KZY
head William Dubay M 56 Apr 1844 MI/MI/MI married 29 yrs
wife Madeline Dubay F 50 June 1850 GER/GE/GER 6 children 3 living immig 1862
son William Dubay M 22 MI
dau Ella Dubay F 17 MI
son Oscar Dubay M 13 MI
World War I Draft Registration
https://familysearch.org/pal:/MM9.1.1/K6XF-H1V
Oscar Dubay
Draft Registration June 2, 1917
place: Macomb County, Michigan, United States
Single White Male
birth 29 Mar 1887 Roseville, MI
country of citizenship: United States
nara publication number: M1509
film number: 1675810
digital folder number: 005251408
image number: 02831
