File:Coat of Arms of Winston Churchill.svg

The original arms of the first Sir Winston Churchill (1620-1688), father of the First Duke of Marlborough, were extremely simple and were certainly in use by his own father in 1619. The shield was Sable a Lion rampant Argent debruised by a Bendlet Gules (figure 1). The addition of the Canton rendered this further distinguishing mark unnecessary. In recognition of the first Sir Winston's services to King Charles I as Captain of the Horse, and his loyalty to King Charles II as a Member of Parliament. At the same time he was authorised to omit the Bendlet, which had served the purpose of distinguishing this branch of the Churchill family from others which bore an undifferenced Lion., he was awarded an augmentation of honour to his arms in 1661/1662. This rare mark of royal favour took the form of a canton of St. George. A canton is a square in the dexter chief, occupying less than a quarter (probably about one-eighth) of the shield, and in this case Argent a Cross Gules. At the same time he was authorised to omit the Bendlet, which had served the purpose of distinguishing this branch of the Churchill family from others which bore an undifferenced Lion.

This revised shield, complete with augmentation of honour, was inherited by his son John Churchill, First Duke of Marlborough (1650-1722). Note that the helm is in profile and has a closed grill; it therefore belongs to a peer. Extra features in these armorial bearings are:

• Supporters: Peers, Knights of the Orders of the Garter and the Thistle and Knights Grand Cross of the other orders of chivalry are entitled to these figures, placed on either side of the shield to support it; they may be human, animal or mythical. In this case they were the mythical Griffin (part lion, part eagle) and Wyvern (a dragon without hind legs).

• Coronet: Immediately above the shield is a coronet, indicating the bearer's rank of duke. Imperial Eagle and Princely Coronet: These unusual features show that the duke was a Prince of the Holy Roman Empire‹a dignity conferred in 1705.

• The Churchill crest is blazoned as a Lion couchant guardant Argent, supporting with its dexter Forepaw a Banner Gules, charged with a dexter Hand appaumée of the first, Staff Or. (This crest, with the dexter Hand appaumée converted into a V-sign, forms the logo of the International Churchill Society and Finest Hour.)