I got his obituary:
ERSEPKE -- In this city, Sept. 11, 1933, William, beloved husband of Theresia Ersepke, loving father of Mrs. Anna Weedman, Mrs. Verna Andrade, Rudolph, Bernhard, Edward, William and Robert Ersepke and the late Carl Ersepke, and devoted brother of Carl Ersepke, native of Austria, aged 63 years. A member of Applewood Camp No. 696, W.O.W. Friends are respectfully invited to attend the funeral Wednesday at 2:30 p.m. from the parlors of Suhr & Wieboldt, 1465 Valencia st., near 26th st. Interment Cypress Lawn Memorial Park.
So, Austria is a little more specific than Germany -- a little more help for your search. :)
The fraternal organization W.O.W. = Woodmen of the World. The California Historical Society has records for the branch in which he was a member! See this link: http://www.oac.cdlib.org/findaid/ark:/13030/kt6d5nf6d2/
They MIGHT have something on him, although most of the records are earlier, it sounds like.
Also, definitely try contacting the fraternal organization itself. Looks like it still exists:http://www.woodmen.org/Members/camps.cfm
I helped someone else whose ancestor was in a different fraternal organization. I contacted them and they had biographical data and a photo that they copied for us. Worth a try! :)
Another possible resource: the funeral home mentioned...