The design is adapted from the seal used by the former county council.

This in turn derived from the anachronistic[1] description of a banner borne by the men of Merioneth at the Battle of Agincourt, in the 17th-century poem of the same name by Michael Drayton.

[note 1] Here he wrote of “three goats dancing "gainst a rising sun"; the shield was blue, the sun golden and the goats white.

Speculation regarding this unusual arrangement suggests a connection with Cader Idris, where goats browsed and behind which the sun rose.

The flag therefore both maintains a theme associated with Merioneth for six centuries and is also a highly distinctive design – no other flag features a sun in this position and the arrangement is uniquely Merioneth.