An incomplete list of Cornish Surnames:
(Please let me know which ones I have omitted!)
RE: pronunciation - most multisyllabic Cornish words and names are accented on the next-to-last (penultimate) syllable.

Uniquely Cornish names

  Other names common among the Cornish   Many Cornish families have English-language occupational or location names like:
         
Andrewartha   Bennets   Smith  
Angove   Bligh   Miller  
Angwin   Corrington   Fletcher  
Argall   Cox   Ward  
Arundell   Davies   Green  
Baragwanath   Edwards   Townsend  
Bennetto   Foote   etc.  
Berryman   Fox      
Billings   Harris      
Bolitho   Harvey      
Bonython   Hicks      
Borlase   Hocking      
Bosanko   Hunkins      
Boscowan   James      
Bosustow   Jenkins, Jenkin      
Carbis   Johns      
Cardew   Julian      
Cardynham   Martin      
Carkeek   Matthews      
Carlyon   Mitchell      
Carmino   Moyle      
Carne   Nance      
Carwithin   Nicholls, Nichols      
Chenoweth, Chynoweth   Oates      
Clemo   Pearce      
Cock   Peter      
Colenso   Phillips      
Connock   Pierce      
Coon   Pomeroy      
Cornish   Richards      
Couch   Rickard      
Curnow   Roberts      
Daddow   Rogers      
Davy   Rowe      
Dew   Rundle      
Dowrick   Stephens      
Dungey   Thomas      
Edgcumbe   Trenholm      
FitzSimmons   Walters      
Freethy   Williams      
Godolphin          
Grenfell          
Grenville          
Growden          
Gummow, Gummo           
Gundry          
Hancock          
Hender          
Hendra          
Herle          
Hobba          
Hugh          
Hunkin          
Jago          
Jope          
Jose          
Kestle          
Kiegwin          
Killigrew          
Kitto          
Lanyon          
Libby          
Mellin          
Menhennett          
Menhennick          
Minear