What is "ryksa"

In early Polish history, the given name Ryksa may refer to:

• Ryksa (Hilderyka, Brunhilda), sometimes mistakenly named as the German wife of the legendary 9th-century Polish ruler Popiel; however, the actual real name of Popiel's wife has not been specified by early historians.
• Blessed Richeza of Lotharingia or Ryksa (around 1063), Queen of Poland, wife of King Mieszko II (1025–1031).
• Ryksa (1018 - after 1059), possible name of wife of Béla "filia Miskæ (Polonorum duce)" as recorded in "The Gesta Hungarorum, ( Europäische Stammtafeln).
• Richeza of Sweden, Queen of Poland, known as Ryksa, spouse of King Przemysł II, born before 1273, deceased before 1293.