In Weimar on 26 May 1555 John Frederick II married his first wife, Agnes of Hesse, Dowager Electress of Saxony. Six months later she suffered a miscarriage and died, on 4 November 1555. In Weimar on 12 June 1558 John Frederick II married his second wife, Countess Palatine Elisabeth of Simmern-Sponheim , daughter of the later (1559) Frederick III, Elector Palatine .
Kingdom of Saxony: Dame of the Order of Sidonia, 1871; Eponyms. Among others, the following were named for her: The steam corvette SMS Augusta, built in the 1860s. The protected cruiser SMS Kaiserin Augusta, built by the German Navy in the year of her death. Kaiserin-Augusta-Straße in Berlin and the Berlin U-Bahn station in that street.