Domhnall II of Mar (c. 1302 in Saline, Fife

Fife

Fife is a council area and former county of Scotland. It is situated between the Firth of Tay and the Firth of Forth, with inland boundaries to Perth and Kinross and Clackmannanshire...

 – 11 August 1332) was Regent

Regent

A regent, from the Latin regens "one who reigns", is a person selected to act as head of state because the ruler is a minor, not present, or debilitated. Currently there are only two ruling Regencies in the world, sovereign Liechtenstein and the Malaysian constitutive state of Terengganu...

 of Scotland

Scotland

Scotland is a country that is part of the United Kingdom. Occupying the northern third of the island of Great Britain, it shares a border with England to the south and is bounded by the North Sea to the east, the Atlantic Ocean to the north and west, and the North Channel and Irish Sea to the...

 for just over a week during the minority of David II

David II of Scotland

David II was King of Scots from 7 June 1329 until his death.-Early life:...

.

His father was Gartnait, Earl of Mar

Gartnait, Earl of Mar

Gartnait of Mar - Gartnait mac Domhnaill - was the eighth known Mormaer of Mar, ruling from somewhere around 1301, perhaps as early as 1297, until his death in 1305...

, and his mother was Christina Bruce

Christina Bruce

Christina Bruce the second daughter of Robert de Brus, jure uxoris Earl of Carrick and Marjorie of Carrick, and an older sister of King Robert the Bruce....

, sister of Robert I of Scotland

Robert I of Scotland

Robert I , popularly known as Robert the Bruce , was King of Scots from March 25, 1306, until his death in 1329.His paternal ancestors were of Scoto-Norman heritage , and...

. In 1332 the regent, Thomas Randolph, 1st Earl of Moray, died. On August 2 Domhnall was elected as the new regent at a meeting of the Scottish nobles at Perth

Perth, Scotland

Perth is a town and former city and royal burgh in central Scotland. Located on the banks of the River Tay, it is the administrative centre of Perth and Kinross council area and the historic county town of Perthshire...

.

Following the invasion of Edward Balliol

Edward Balliol

Edward Balliol was a claimant to the Scottish throne . With English help, he briefly ruled the country from 1332 to 1336.-Life:...

, with the support of Edward III of England

Edward III of England

Edward III was King of England from 1327 until his death and is noted for his military success. Restoring royal authority after the disastrous reign of his father, Edward II, Edward III went on to transform the Kingdom of England into one of the most formidable military powers in Europe...

, Mar led the Scots loyalists to confront them. He was defeated and killed at the Battle of Dupplin Moor

Battle of Dupplin Moor

The Battle of Dupplin Moor was fought between supporters of the infant David II, the son of Robert the Bruce, and rebels supporting the Balliol claim in 1332. It was a significant battle of the Second War of Scottish Independence.-Background:...

, only nine days after his election as regent.

Through his marriage to Isabella Stewart they had a son Thomas

Thomas, Earl of Mar

Thomas of Mar was a 14th century Mormaer of Mar . He was a son of Domhnall II of Mar.Thomas became Earl of Mar whilst still a child living in the Kingdom of England, and it took several years for Thomas to return to the Kingdom of Scotland and take charge of his inheritance...

, and a single daughter, Margaret

Margaret, Countess of Mar

Margaret of Mar was Countess of Mar, an ancient Earldom in Scotland, in her own right.She was a daughter of Domhnall II of Mar and after the death of her childless brother Thomas became Countess of Mar...

, who succeeded her brother and became in her turn Countess of Mar

Earl of Mar

The Mormaer or Earl of Mar is a title that has been created seven times, all in the Peerage of Scotland. The first creation of the earldom was originally the provincial ruler of the province of Mar in north-eastern Scotland...

.