What was the man that preceded Frederick IV of Hohenstaufen also known as in another language?
Frederick IV, Duke of Swabia Frederick IV of Hohenstaufen (1145–1167) was duke of Swabia, succeeding his cousin, Frederick Barbarossa, Holy Roman Emperor, in 1152.
Frederick of Luxembourg Frederick of Luxembourg (965 – 6 October 1019), Count of Moselgau, was a son of Siegfried of Luxembourg and Hedwig of Nordgau.