Kewish is a Celtic

Celtic languages

The Celtic languages are descended from Proto-Celtic, or "Common Celtic"; a branch of the greater Indo-European language family...

 surname of Manx

Manx language

Manx , also known as Manx Gaelic, and as the Manks language, is a Goidelic language of the Indo-European language family, historically spoken by the Manx people. Only a small minority of the Island's population is fluent in the language, but a larger minority has some knowledge of it...

 origin.

• Pronounced Keoush.
• Contracted from Mac Uais, "The Noble's Son." Colla Uais
  Colla Uais
  Colla Uais , son of Eochaid Doimlén, son of Cairbre Lifechair, was, according to medieval Irish legend and historical tradition, a High King of Ireland. His given name was Cairell...
  
   was the 121st Milesian Monarch of Ireland [FFE 306-310, AFM 322-326].
• Kewish [1618], Kevish [1653], Kewesh [1683].

External links

• http://www.isle-of-man.com/manxnotebook/manxnb/v08p153.htm
• http://www.ucc.ie/celt/online/T100054/text057.html