• Born: 1090, Hohenstaufen, Swaben, Bayern
• Married (1): Between 1119 and 1121
• Married (2): Between 1132 and 1133
• Died: 6 Apr 1147, Alzey

  Research Notes:

The Tabula consanguinitatis Friderici I regis et Adelæ reginæ (which provided the basis for their divorce) names "ducem Fridericum", father of "regem Fridericum", as son of "ducem Fridericum, qui Stophen condidit" and "filia regis Heinrici".

He succeeded his father as FRIEDRICH II "der Einäugige" Duke of Swabia in 1105. Regent of Germany 1116. His maternal uncle Emperor Heinrich V considered him as his successor and bequeathed him the Salian dynasty's family properties to increase his personal prestige, but on the Emperor's death in 1125 Friedrich was passed over as candidate for the German throne in favour of Lothar von Süpplingenburg Duke of Saxony whom the German nobility saw as less of a dynastic threat. After refusing to hand over his inherited crown lands to the new king, Duke Friedrich was outlawed. Friedrich eventually submitted to Emperor Lothar in 1135 with his brother. He agreed to transfer the crown lands, but was allowed to remain as Duke of Swabia. "Dux Fridericus…" witnessed a charter dated 25 Jul 1139 under which Adalbert [II] Archbishop of Mainz confirmed his predecessor's grants to Kloster Jechaburg.

The Gesta Friderici of Otto of Freising records the death of Duke Friedrich and his burial "in monasterio sanctæ Waltpurge…in terminis Alsatiæ sito". The Necrology of Zwiefalten records the death "VIII Id Apr" of "Fridericus dux de Stouphin". ¹