Jon Kuvlung (1150–1188)
Born 1150 CE, died 1188 CE.
Jon Ingesson Kuvlung (born 1157 - died 1188) was a pretender to the Royal Crown during the civil war era in Norway. He was a rival of the reigning King Sverre of Norway.
Text from the Wikipedia article Jon_Kuvlung, licensed CC BY-SA 4.0.