Toponymy
The Cait element of Caithness is Pictish or Goidelic in origin but the origin of Caithness is Norse or Norn, and may be read as meaning Horn (or Nose) of Cait. The Gaelic name, Gallaibh, means among the foreigners (the Norse). The Cait element of Caithness is represented as Cat in Cataibh, the Gaelic name for Sutherland, and as Cait in Na h-Innse Cait, the Old Irish for Shetland. The Kingdom of Cait was one of the seven Pictish kingdoms in Alba and is believed to have been in the area of Caithness and Sutherland.
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