Pentewan Beach (EN) / Bentewyn (KW)

Hundred: 
Elements: 

ben

Meaning: 
foot (of a hill, stream)

tewyn [2]

Meaning: 
glittering, sparkling
Elements notes: 
ben 'foot' + tewyn stream name
Historic forms: 
Porth Bensewen 1302, Portbentewen 1302, Por Pentuan 1699.