Susan Goldsmith asked about the given name Losche.  This still doesn't answer the question about what given name she may have adopted in the US. 

If you look at the outbound manifest from Hamburg, her given name is shown as SOSCHE, with an initial S, not Losche. 

Barbara Zimmer 

Virginia 

You may wish to contact Jewish Tour (jewish-tour.com), a long established firm based in Minsk, which offers an in-depth genealogical service as well as heritage tours. Another avenue which you might pursue is to contact Hesed - Rachamin, (hesed@...), also in Minsk.  They can check to see if anyone with the family name you are seeking is listed on their register. 

I have been there many times. Initially I tried taking photos, but the staff is fairly alert and will reprimand you. Recently much of the microfilm has been indexed and you can see images online rather than using a microfilm reader (which are usually 50% out of commission and out of focus). The place is run on a shoestring clearly, and I have sympathy for the obvious fact they have no funding. At least the staff is helpful. My solution is to make up in advance a spreadsheet with identifiers for all the records I want to look up, and then when I have the image, enter the information in columns prepared for the data I need. The value to genealogists of marriage documents is to be able to decipher the names of the parents of both parties, addresses that help verify identities, and sometimes the officiant and witness names can be helpful as well. Birth and death record images can also contain unindexed information. Beware that this office has only the archived records that NYC allows to be public, and that NYC is very recalcitrant about liberating records that should be public by now (e.g. births only available to 1909). This office is separate from the Health Dept, which has later records and is much less public-friendly.
Susan Schwartz

Thank you for your quick response to my question, Sherri!  I’ve already researched Familysearch.com & other websites.  I have almost reached the conclusion that my grandfather never was naturalized although I just received a very specific link within the NARA.  I will try this link before I put this question to rest.

Best wishes,

Marian Apple 🍎 

If you have the C-file number, then you can skip the initial index search and go straight to a request for records.  However, see this cautionary note about errors locating file numbers:  https://www.uscis.gov/history-and-genealogy/genealogy/genealogical-records-help/avoid-common-genealogical-research-errors