David I Strathbogie was the first of the Strathbogie

Strathbogie

Strathbogie may refer to:* Strathbogie, the old name of Huntly in Scotland, and the strath to the south of it.* Strathbogie, Victoria, Australia* Shire of Strathbogie, Victoria, Australia* Strathbogie Ranges, Victoria, Australia...

 Earls of Atholl.

David was the son of John de Strathbogie and Ada, suo jure Countess of Atholl.

He died at Tunis

Tunis

Tunis is the capital of both the Tunisian Republic and the Tunis Governorate. It is Tunisia's largest city, with a population of 728,453 as of 2004; the greater metropolitan area holds some 2,412,500 inhabitants....

 (or Carthage

Carthage

Carthage , implying it was a 'new Tyre') is a major urban centre that has existed for nearly 3,000 years on the Gulf of Tunis, developing from a Phoenician colony of the 1st millennium BC...

) in the Eighth Crusade

Eighth Crusade

The Eighth Crusade was a crusade launched by Louis IX, King of France, in 1270. The Eighth Crusade is sometimes counted as the Seventh, if the Fifth and Sixth Crusades of Frederick II are counted as a single crusade...

, in the company of Louis IX of France

Louis IX of France

Louis IX , commonly Saint Louis, was King of France from 1226 until his death. He was also styled Louis II, Count of Artois from 1226 to 1237. Born at Poissy, near Paris, he was an eighth-generation descendant of Hugh Capet, and thus a member of the House of Capet, and the son of Louis VIII and...

, having married before June 1266, Isabel (d. 1292), daughter of Richard de Dover, feudal baron of Chilham

Chilham

Chilham is a parish in the English county of Kent. Visited by tourists worldwide, it is known for its beauty. Chilham has been a location for a number of films and television dramas...

, Kent

Kent

Kent is a county in southeast England, and is one of the home counties. It borders East Sussex, Surrey and Greater London and has a defined boundary with Essex in the middle of the Thames Estuary. The ceremonial county boundaries of Kent include the shire county of Kent and the unitary borough of...

, by his spouse Maud

Matilda, Countess of Angus

Matilda of Angus was the daughter of Maol Choluim, Earl or Mormaer of Angus and as his heiress was countess of the province in her own right.She was first married to John Comyn, but his early death in France in 1242 meant that a new husband was needed to control the dispersed Earldom. The man...

, suo jure Countess of Angus

Earl of Angus

The Mormaer or Earl of Angus was the ruler of the medieval Scottish province of Angus. The title, in the Peerage of Scotland, is currently held by the Duke of Hamilton.-Mormaers:...

. In 1266 Isabel was heiress to her brother, Richard de Dover, by which she inherited the barony of Chilham, with the manor of Chingford Earls, Essex. In 1270 they leased the latter to the Knights Templar

Knights Templar

The Poor Fellow-Soldiers of Christ and of the Temple of Solomon , commonly known as the Knights Templar, the Order of the Temple or simply as Templars, were among the most famous of the Western Christian military orders...

 by license from the king.

The 8th Earl of Atholl was succeeded in by their only son, John de Strathbogie, 9th Earl of Atholl

John de Strathbogie, 9th Earl of Atholl

John of Strathbogie was warden and Justiciary of Scotland.-Early years and family:John was born in Atholl, Perthshire, Scotland around 1266. He was the son of David I Strathbogie, Earl of Atholl , by his spouse Isabel, daughter of Richard de Dover, Baron of Chilham, Kent...

, Warden and Justiciar of Scotland.