WONDRACK

I am trying to locate any information about this family. I have a World War Two Draft Registration record of an August WONDRACK, born August 24, 1884 in Bohemia. He lived in NY until approximately 1943 when he moved to San Francisco. I have been unable, to this point, to find any other information about him. There are no records, to date, regarding his ever living in SF for any prolonged amount of time. I have checked for a passenger list or any documentation and can only find him in a few NY City directories. There is no record located at this point that says where in Bohemia he was from. HELP, please!!!!!