From what US document have you collected Orlova?
What was language spoken by your ancestor? Do you know religion of your ancestor? http://users.erols.com/mwhite28/austhung.htm
where 12 different languages were spoken. This is the A-H your ancestor was from.
the HAZUDAs that arrived NY Ellis Island were from historical Ruthenia, which was for a short while part of Czechoslovakia but now is Ukraine.
Full map of Czechoslovakia www.cgsi.org
Hazuda, Anna Erlava, Tseco-Sl. 17 1906 1923
Hazuda, Michal Erlava, Tseco-Sl. 25 1898 1923 The closes to Orlova spelling that arrived NY Ellis Island. http://www.radixindex.com/en/surname_index/surname/hazudahttp://www.radixindex.com/en/surname_index/surname/hazuga