There is a marriage at familysearch.org in 1918.
George C. Brown- birth 1887, Belford County, VA
Parents-Joseph A. Brown and Jennie Shaffer
Parents-Horace Guernsey and Dodge
Marriage-July 22, 1918 in Oswego, NY
In the census information with Bertha and children he is under the first name George.
Buffalo NY Evening News-1939
Grover Brown, 52, 353 Forest
(Bertha and children in 1940 census live at 353 Forest Ave)
Buffalo NY Evening News 1939-June 26
George C. Brown, in Buffalo June 25, 1939, husband of Bertha Guernsey; father of Edward B., Florence P., Betty J. Brown. Funeral from the Gordon L. Snyder funeral home, 483 Grant St., Thursday at 2 p.m. Friends are invited.