What is "eystein"

Eystein is the name of:

• Eystein Erlendsson (d. 1188), Norwegian bishop and saint
• Eystein Halfdansson (fl. c. 730), king of Romerike and Vestfold in what is now Norway
• Eystein Haraldson (died 1157), king of Norway
• Eystein Ivarsson (d. 830) was Jarl of Oplande and Hedmark in Norway
• Eystein Magnusson (c.1088–1123), king of Norway
• Eystein Meyla (died 1177), also known as Eystein Eysteinson, Norwegian pretender