Coat of arms of Nowlan

The blazon

az. two cantons ar. ; on the dexter, a rose gu. ; on the sinister, a thistle vert. — Crest, an arm, in armour, az. hand ppr. couped at the shoulder, embowed, resting the elbow on the wreath, and holding a sceptre or.

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.