My great grandfather, Hermann Otto Keiger, was born August 31, 1893 in Bochum, Prussia. He immigrated to the USA in 1914. Verbal history in the family is that his last name was Kayka in prussia and changed to Keiger when he got here.
I am lost as how to proceed with my research in German records. How do I find a birth certificate, who his parents are, or if the last name is even right??
Any help would be greatly appreciated.