The two main devices (symbols) in the Gnerro blazon are the chevron and cross. The two main tinctures (colors) are vert and gules.
The deep green colour that is so often observed in heraldry is more properly known as vert. According to Wade, the use of this colour signifies “Hope and Joy”, but may also represent, rather delightfully, “Loyalty in Love” 1. It has other names also, the French call it sinople, perhaps after a town in Asia Minor from where the best green die materials could be found 2. More fanciful heralds liked to associate it with the planet venus and the precious stone emerald 3. More strangely, there is some evidence that the term prasin was anciently used, being the Greek for the vegetable we call the Leek!
The bold red colour on a heraldic shield is known as gules. It has a long history within heraldry, it is known that one of those who besieged the scottish castle of Carlaverock in 1300 was the French knight Euremions de la Brette who had as his arms a simple red shield.4. The word gules is thought to come from the Arabic gule, or “red rose” 5. Later writers associated it with the precious stone ruby and the metal iron 6, perhaps because of the red glow of iron in the heat of the blacksmith’s forge.
The chevron is one the major shapes used upon a shield, known as ordinaries. The inverted ‘V’ of the chevron is perhaps thought to have originated to represent a military scarf folded on the shield 7, or additional cross-pieces used to strengthen the shield and painted a different colour.8. It has also acquired the meaning of “Protection… granted… to one who has achieved some notable enterprise” 9, possibly becuase of its resemblance to the roof truss of a house.
No other symbol appearing in heraldry is subject to as much variation as the cross 10. Mediaeval Europe was a deeply religious and Christian and many of the nobility wanted to show their devotion by adopting the symbol of the cross as part of the arms. In its basic form, the cross is created from two broad bands of colour at right angles covering the whole extent of the shield. It has been subject to all manner of embellishment, and the interested reader is referred to the references, especially Parker’s Heraldic dictionary for many examples of these. 11 12 13 Suffice it to say that any armiger would be proud to have such an important device as part of their arms.