He applied for, and on 24 November 1919, was granted Arms in the name of Shepherd-Folker by the College of Arms. The grant was in the name of Horace Shepherd Shepherd-Folker (formerly Horace Shepherd Folker). The registration description is Quarterly, 1 and 4, a fesse nebuly ermine, between eight cross crosslets, five in chief and tree in base (for Folker); 2 and 3, azure, on a pale ermine, surmounted by a chevron argent, thereon three fleurs-de-lys of the field, two estoiles sable (for Shepherd). Mantling gules and argent. Crests - on a wreath of the colours, in front of a bull's head erased sable, semée of cross crosslets or, horned agent, a crescent silver (for Folker); on a wreath of the colours, a ram passant argent, horned or, resting the dexter foot on a hurt, charged with an estoile silver (for Shepherd), Motto - "Vi et perserverantia". In basic detail, the Arms comprise a black bull (for Folker) and a white ram (for Shepherd) over a quartered shield around which is written For God and the Empire and below which is the motto Vi et Perseveranta. This final version came after a draft version had been worked upon.

There seems to have been an interest by Horace in the marriage of his great grandfather Samuel Folker to Sarah Shepherd. The name of Shepherd had come down through the following three generations via Horace's father, Horace himself and his own son, Stuart Shepherd Folker.

Horace next commissioned the College of Arms to produce a pedigree, the purpose of which seems to have been to establish the connection that was understood to link to Sir Isaac Newton. The name Newton had been carried through the family as a middle name and continues to do so. The pedigree did indeed make this connection, but not directly to Sir Isaac as he died without marrying or fathering a child.