S. A. von Rottemburg was a German entomologist in the 18th century. Little is known about him by scientific historians. In the 1770s he took over Johann Siegfried Hufnagel's lepidopterological collection and published several works about it.
(Rottemburg, 1775) refers to Anmerkungen zu den Hufnagelischen Tabellen der Schmetterlinge, Erste Abtheilung, published in 1775
Read more about Rottemburg in Wikipedia.