The title Duke of Ross has been created twice in the Peerage of Scotland

Peerage of Scotland

The Peerage of Scotland is the division of the British Peerage for those peers created in the Kingdom of Scotland before 1707. With that year's Act of Union, the Kingdom of Scotland and the Kingdom of England were combined into the Kingdom of Great Britain, and a new Peerage of Great Britain was...

, both times for younger sons of the King of Scotland. Named for Ross

Ross-shire

Ross-shire is an area in the Highland Council Area in Scotland. The name is now used as a geographic or cultural term, equivalent to Ross. Until 1889 the term denoted a county of Scotland, also known as the County of Ross...

 in 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...

, it was first created in 1488 for James Stewart, Earl of Ross

James Stewart, Duke of Ross

James Stewart, Duke of Ross was the son of King James III of Scotland and Margaret of Denmark.-Titles and Offices:He was made Marquess of Ormond at his baptism...

, the second son of James III

James III of Scotland

James III was King of Scots from 1460 to 1488. James was an unpopular and ineffective monarch owing to an unwillingness to administer justice fairly, a policy of pursuing alliance with the Kingdom of England, and a disastrous relationship with nearly all his extended family.His reputation as the...

. On his early death in 1504, the title became extinct.

The title was created a second time for Alexander Stewart

Alexander Stewart, Duke of Ross

Alexander Stewart, Duke of Ross was the fourth and last son of King James IV of Scotland and his queen Margaret Tudor....

, the youngest son of James IV

James IV of Scotland

James IV was King of Scots from 11 June 1488 to his death. He is generally regarded as the most successful of the Stewart monarchs of Scotland, but his reign ended with the disastrous defeat at the Battle of Flodden Field, where he became the last monarch from not only Scotland, but also from all...

. On his death at the age of one in 1515 the title became extinct.

Dukes of Ross, first creation (1488)

Other titles: Marquess of Ormonde (1488), Earl of Ross

Earl of Ross

The Mormaer or Earl of Ross was the leader of a medieval Gaelic lordship in northern Scotland, roughly between the River Oykel and the River Beauly.-Origins and transfers:...

, Earl of Ardmenach and Lord Brechin and Navar (1481)

• James Stewart, Duke of Ross
  James Stewart, Duke of Ross
  James Stewart, Duke of Ross was the son of King James III of Scotland and Margaret of Denmark.-Titles and Offices:He was made Marquess of Ormond at his baptism...
  
   (1476–1504), second son of James III
  James III of Scotland
  James III was King of Scots from 1460 to 1488. James was an unpopular and ineffective monarch owing to an unwillingness to administer justice fairly, a policy of pursuing alliance with the Kingdom of England, and a disastrous relationship with nearly all his extended family.His reputation as the...
  
  

Dukes of Ross, second creation (1514)

• Alexander Stewart, Duke of Ross
  Alexander Stewart, Duke of Ross
  Alexander Stewart, Duke of Ross was the fourth and last son of King James IV of Scotland and his queen Margaret Tudor....
  
   (1514–1515), posthumous fourth and youngest son of James IV
  James IV of Scotland
  James IV was King of Scots from 11 June 1488 to his death. He is generally regarded as the most successful of the Stewart monarchs of Scotland, but his reign ended with the disastrous defeat at the Battle of Flodden Field, where he became the last monarch from not only Scotland, but also from all...