The Irish surname Sisk is found almost exclusively today in East Cork where it arrived in the early 18th Century. The name Sisk is originally of Welsh origin, the earliest form of the name being found in Tenby, Wales in 1405. The name finds it's origin in the Welsh-Celtic term Sayse, a term given to anglicized Celtic Welshmen meaning “English speaking.”  By the early Medieval Period some Welshmen bearing this surname immigrated to County Kildare where they were huntsmen and falconers for the Earls of Kildare. Sayse became Saghas or Seix. Over the centuries descendents of these men moved throughout Ireland. In East Cork Seix became Sisk. Today there are approximately 12,000 bearers of the surname Sisk living in The United States.