A few possibilities that probably will require you to carefully study the original images online (Ancestry.com, possibly elsewhere).

1.

World War I Draft Registration
Ohio - Summit - Akron

KOVAC, Andy - born 09/28/1886 in Hungary
wife and children


1920 Federal Census
same place

KOVAC, Andy
wife Susie, children Elizabeth and Steve


2. World War I Draft Registration
Pennsylvania - Allegheny - Elizabeth

KOVACH, Gustav - born 09/28/1889 in Hungary


1920 Federal Census
same place

KOVACH, Tony
with brother?


World War II Draft Registration
Pennsylania - xxx - East Pittsburgh

KOVACH, Gustave A. - born 09/28/1889 in Hungary
with (wife?)


3.

Social Security Death Index

KOVACH, Anton M.
09/28/1888 - 02/13/1974
Wisconsin - Milwaukee - Milwaukee


Good luck!