Gissur or Gizur [ˈcɪsːˌʏːr̥] is an Icelandic given name, originally from Old Norse Gizurr [ˈɡit͡sˌurː]. Notable persons with that name include: Gizur, a King of the Geats. Gissur Teitsson, known as Gissur the White, 11th century Icelandic chieftain. Gissur Ísleifsson (1042–1118), second bishop of Iceland, and grandson of Gissur Teitsson. Gissur Þorvaldsson (1208–1268), Icelandic chieftain. Gissur Einarsson (c. 1512 – 1548), Icelandic bishop. Gissur Petersson (born 1958), Icelandic political scientist and economist. See also. Gissurarson
https://en.wikipedia.org/wiki/Gissur