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| | Encyclopedia: Frederick I, Holy Roman Emperor |
 | | Heinrich (Henry) II, (born 1107, died January 13, 1177), Count Palatine of the Rhine 1140-1141, Margrave of Austria from 1141 to 1156, Duke of Bavaria from 1143 to 1156, Duke of Austria 1156-1177, was a prince from the dynasty of Babenberg. |
 | | Philip of Swabia (1177-1208), German king and duke of Swabia, the rival of the emperor Otto IV, was the fifth and youngest son of the emperor Frederick I and Beatrix, daughter of Renaud III, count of Burgundy, and consequently brother of the emperor Henry VI. |
 | | Lothair II of Supplinburg (1075– 1137), was the Duke of Saxony (1106), King of Germany (1125), and Holy Roman Emperor from 1133 to 1137. |
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