Coat of arms of Dun

The blazon

az. wolf, rampant, ar. charged on the shoulder, with a fleur-de-lis gu. — Crest, out of a ducal coronet or, a bear s paw, erect, of the last, grasping a snake ppr. [Granted, 1558.] ( Another crest, three snakes, erect, and tied in the middle in a knot ppr.)

A blazon is the description of a coat of arms in the technical language of heraldry. The drawing comes from that text, and from nothing else.