Typically, a device or symbol would be a personal decoration. It is common to express your name and household with colors being the only unified characteristic among individuals. The representation for a house is usually in the form of a banner artwork, or jewelry. The following shows a sample of a personal device with a detailed explanation.
A simple Diamond shape based on the Diamond Dog name. Being the ancestral home of the Diamonds Dogs, the green and gold of Anglesey are the only color options. The green lines represent the haste of establishing a herald device during the eve of battle. The pattern is varied and sporadic, sometimes representing the stream of fighting that occurs in a war.
The gold background symbolizes the Ang, another documented heraldry device. The Ang is a knot work symbol of gold intertwined to create a circle.