Earl of Ulster

The king sent a letter to the feudal barons of Ulster — allies of de Courcy – informing them that if they did not convince their lord to pay proper homage, all their land would be seized.

A bloody battle between the two sides ensued at a place called Dundaleathglass (possibly Down), but de Courcy escaped following the defeat.

And know ye, that we do retain with us the aforesaid Hugh, and are leading him with us in our service; and therefore to you we command that his land and all his you preserve, maintain and defend as our demesne.

[3][7][8][9] The Burgh coat of arms (or a cross gules) was adopted as the flag of Ulster, though the title passed through the female line out of the family and eventually merged with the Crown.

After the third earl was murdered at age 20 (leading to the Burke Civil War), he left only a daughter, Elizabeth de Burgh, 4th Countess of Ulster.

She married Lionel of Antwerp, second surviving son of King Edward III, who held the title jure uxoris.

The current incarnation of the title dates to 31 March 1928, when Prince Henry, the third son of King George V and Queen Mary, was simultaneously created Duke of Gloucester, Earl of Ulster and Baron Culloden in the Peerage of the United Kingdom.

Arms of the de Burgh , Earls of Ulster: Or, a cross gules . [ 1 ]
Arms of Mortimer, Earls of March and Earls of Ulster: Barry of six or and azure on a chief of the first two pallets between two gyrons of the second over all an inescutcheon argent (Mortimer), quartered with arms of de Burgh [ 2 ]
Arms of Richard of York, 3rd Duke of York, 8th Earl of Ulster: Quarterly , 1st and 4th, quarterly, France moderne , and England , overall a label of three points each charged with three torteaux ( House of York ), 2nd, quarterly, Castile and Leon , 3rd, quarterly, Mortimer and de Burgh , and overall an inescutcheon gules, three lions passant guardant or a bordure Argent ( Holland, Earl of Kent )