English: Coat of arms of Norton Knatchbull, 3rd Earl Mountbatten of Burma and 8th Baron Brabourne.
Arms: Quarterly 1st, Azure, in bend three Crosses-Crosslet fitchée between two Bendlets Or (Knatchbull); 2nd, Argent, two Pellets Sable (Mountbatten); 3rd, Azure, a Lion rampant double queued barry of ten Argent and Gules, crowned Or, within a Bordure compony Gules and Argent (Hesse); 4th, The Royal Arms differenced by a Label of three-points Argent, the centre point charged with a Rose Gules, and the outer points with an Ermine Spot Sable (Princess Alice);
Crests: 1st, On a Chapeau Gules, turned up Ermine, an Ounce statant Ermine, spotted Sable (Knatchbull); 2nd, Out of a Ducal Coronet Or, a Plume of Ostrich Feathers alternately Argent and Sable (Mountbatten); 3rd, Out of a Ducal Coronet Or, two Horns barry of ten Argent and Gules, issuing from each three Linden Leaves Vert, and from the outer side of each horn four Branches barwise having three like Leaves pendent therefrom Vert (Hesse);
Supporters: On either side a Lion double queued and crowned all Or;
Mottoes: 1st, IN CRUCIFIXA GLORIA MEA (My Glory is in the Cross)(Knatchbull); 2nd, IN HONOUR BOUND (Mountbatten).