From census records it appears that his full name was George Calvin Hocker and he had two brothers, William Fred and Carl. His WWI Draft Registration states that he was single in 1917. The 1930 census shows a Calvin Hocker living in Lonestar, Graham County, Arizona; born in KY about 1887; married to Annie M. with two young children.
Calvin died in Mexico 17 January 1948. See the Mexican "Report of Death of an American Citizen" below.
Name: Calvin Hocker
Birth Date: 19 Dec 1886
Birth Place: Beaver Dam, Ohio, Kentucky
Passport Issue Date: 20 Jan 1921
Passport Includes a Photo: Yes
Residence: El Paso, Texas