The US Draft card and Petition for Naturalization for Rudolf Siegfried Nothmann both say he was born in Hamburg on 04.02.1907. Two record of the death of Rudolf Siegfried Nothmann in Los Angeles on 25.08.1997 give the same social security number; one gives his date of birth as 04.02.1907, while the other gives his mother's maiden name as "Heymmann" (sic) and his date of birth as 01.02.1907. It seems very likely that, allowing for typographical errors, all four records relate to the same person and that he is a son of Nathan Nothmann and his wife Gella Henriette geb. Heymann who were married in Hamburg in 1905.