Dun
A New Law Dictionary and Glossary · Alexander M. Burrill · 1850
A New Law Dictionary and Glossary
Sax. [L. Lat. duna, dunum.] A hill of small elevation; a low hiU.
Domesday. Co. Litt. 4 b.
Places in England, the names of which end in dun, or don, (Lat. dunum,) are supposed to have been so called from their elevated situation. Id. CotoelL Spelman, voc.
Dunum
Hence banks, or elevations along the sea shore are called downs.