The original spelling yielded no results, so I used only the first initial and last name. This combination gave me one result within the birth time frame: Mojsze Hersz Ostrowski. I wanted to double check that there wasn't someone with a similar last name and the right first name, so I also did a search using the original first name and a "sounds like" for the last name. This gave me one possible result: Mosze Natan Ostrowiecki. However, Mosze Natan was born in 1934, which puts him about three years off from the usual age, and his occupation is listed as "kind" or "child". Mojsze Hersz, however, was born in 1931, which puts him right within the time frame, and his occupation is listed as "Schueler". Therefore, I think Mojsze Hersz Ostrowski is the likelier candidate.