There is a representation of a Coat of Arms of a branch of Blair of that Ilk of Southwest Scotland. These actual arms were found on a gravestone in Antrim, Ireland. Note the crescents on each side, the star at the top, and the garb at the bottom. These would have been added by a descendant of Blair of that Ilk to separate him/her from the main family. The saltier cross with the nine mascles would indicate that this Blair was a descendant of the house of Blair of that Ilk. The crest, in this case the stag lodged proper, could vary on the arms as well.

Other crests that exist for Blair of that Ilk descendants is a stag's head cabossed, or a Boar's head couped. Typical crests for Blair of Balthayock descendants are a dove, wings expanded, an eagle rising, or a Roman head armed. Another crest found on Blair arms is a garb.

Other arms for Blairs have the primary shield combined with that of another. An example is the Blair of that Ilk shield impaled with the Hamilton that can be found on the main front door of the Blair House in Dalry, Scotland. Inside, on the fireplaces, the Blair arms are quartered with the Scott family arms. This type of combining represents the joining of two families. The Blair of Balthayock arms can be found combined in the same manner.