Marquess of Downshire, Earl and Viscount of Hillsborough, Viscount Kilwarlin, and Baron Hill of Kilwarlin, in Ireland. Earl of Hillsborough, Viscount Fairford and Baron Harwich, in Great Britain.
Quarterly: 1st, sa., on a fesse, arg., between three leopards, passant guardant, or, spotted, of the field, as many escallops, gu., for Hill; 2nd, party per bend sinister, erm. and ermines, a lion, rampant, or, for Trevor; 3rd, gu., a cinquefoil, or, for Rowe; 4th arg., a chevron, az., between three trefoils, slipped, per pale, gu. and vert, also for Rowe.
A reindeer's head, couped, gu., attired and plain collared, or.
Dexter, a leopard, or, spotted, sa., ducally gorged and chained, gu.
Sinister, a reindeer, gu., attired, unguled, and plain collared, or.
PER DEUM ET FERRUM OBTINUI.
Translation: Through God and my sword I have obtained.
NIL TENTES, AUT PERFICE.
Translation: Attempt not, or accomplish.
– Burke's Peerage, 1923.