First found in Lanarkshire, where they were anciently seated in their territories. The Pictish influence on Scottish history diminished after Kenneth Macalpine became King of all Scotland. But those east coast families still played an important role in government and were more accessible to Government than their western highland counterparts. Alliances were important to Scottish middle age survival. Later they were seated at Lanark when Adam de Cadiou or Cadyow rendered homage to the King of Edward 1st in 1296.

Some of the first settlers of this family name or some of its variants were: the name represented in many forms and recorded from the mid 17th century in the great migration from Europe. Migrants settled in the eastern seaboard from Newfoundland, to Maine, to Virginia, the Carolinas, and to the islands..

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