The coat of arms is a Gules, three wolves' heads erased two and one Argent, armed and langued Azure (Red, three wolves heads erased silver, armed and tongued blue), where as the badge shows is a dexter hand holding up an imperial crown Proper
Songs of the clan include Robertson's Rant", "Robertson of Ladykirk" and "Robertson of Lude.



En héraldique écossaise, l’usage le plus important du loup est le fait du Clan Robertson, qui le tient de Struan Robertson qui occupa le trône d’Ecosse au XIe et XIIe siècle. Ce clan, connu également sous le nom de Donnachaidh tire son origine d’une légende lié au loup. Cette légende prétend que le roi Malcolm Canmore attaqué par un grand loup fut sauvé par Thomas de Rannoch qui utilisa son plaid et son couteau pour venir à bout de la bête. Aujourd’hui le blason des Robertson se décrit comme suit : De gueules, à trois têtes de loup arrachées d’argent, à la bordure du même.

This representation of the Coat of Arms of Clan Donnachaidh belongs to the Chief and may only be used or worn by him, this is also true of wearing a feather in the bonnet. The other clan members may wear the Crest Badge or the Clan Plant Badge on their bonnet.
The man in chains at the bottom of the crest represents the capture of the murderers of King James I by Robert, forth Chief of Clan Donnachaidh and for whom Clan Robertson is named.
The hand holding the crown shows that the Clan supports the Monarchy. The wolfs heads are the family banner.
The helmet represents the Barony. The Fine-Leafed Heath (bruyère) and the Bracken Fern (fougère) are the Clan Plant Badges.
The motto "Virtutis Gloria Merces" is Latin for "Glory the reward of valor". "Garg'n Uair Dhuisgear" is Gaelic for "Fierce when Roused" and is the Clan battle cry.
The Serpent and Dove are called supporters and identify the Clan as being descended from Saint Columba and represent a pun on his name, ESTO PRUDENS UT SERPENS ET SIMPLEX SICUT COLUMBA, "Be wise as the Serpent and gentle as the Dove.".