The arms combine the Greig and Fenton base arms of the armiger’s parents. Greig arms feature variants of three hands Argent and a bordure on a Gules field. The ancient arms of Lord John Fenton who signed the declaration of Arbroath in 1320 were Gules a bend engrailed Argent, these arms were not inherited and became extinct with his passing.

The armiger claims no descent from this Lord Fenton's wider family but utilised the ordinary of these extinct arms as well as the field, Gules shared by both Fenton and Greig arms. The engrailed bend of Fenton and the three Grieg hands in bend (Greig of Ballingry) fell naturally together.

Despite being a third son, the bordure is not a mark of cadency, but an ordinary along with the three hands implying a Greig achievement. Without the bordure as an ordinary the arms would be ambiguous, being possibly Fenton with hands as a difference.

Eight mullets Sable charge the bordure, the mullet being the minute temporary brisure of a third son. These mullets are black to reflect the black raven crest with their quantity distributing well, both in shield and banner.

For crest the armiger has a raven rising proper. The name of the armiger’s son 'Cormac' being Gaelic for 'son of the raven', it holds a crescent Gules in the dexter claw, representing the armiger’s twin brother as second born.