Duncan Campbell, 1st Lord Campbell

Duncan Campbell, 1st Lord Campbell (Classical Gaelic Donnchadh mac Cailein, and also called Donnchadh na-Adh (English: Duncan the fortunate) of Loch Awe, (died 1453), was a Scottish nobleman and politician. He was an important figure in Scottish affairs in the first half of the 15th century and Justiciar of Argyll. He was head of the Clan Campbell for 40 years.

Duncan's date of birth is in 1390 in Lochow Argyll. He was the son of Colin Campbell of Lochawe (called Colin Iongantach 'Wonderful', and 'Colin The Good Knight'), and Mariota, daughter of John Campbell, heiress to the lands of Ardscotnish and Glen Orchy. Colin obtained a dispensation by 13 January 1366 permitting the marriage of Mariota to his son John. He evidently changed his plans and married Mariota himself as in 1372 he obtained a second dispensation, this allowing Colin and Mariota to remarry, after a separation, having already married although within the prohibited degree of kinship.

Duncan may not have been their eldest son: a brother named John Annam, John the Weak, is said to have been passed over. Duncan was seemingly the chosen heir by 6 February 1393 when he was granted the lands of Menstrie by his father. On Colin's death, some time before 19 January 1414, Duncan became head of the Campbells of Loch Awe.

Duncan was twice married, first to Marjorie (d. before August 1432), daughter of Robert Stewart, Duke of Albany, secondly to Margaret Stewart of Ardgowan (d. after August 1442).

Duncan's closeness to the Albany Stewarts led to King James I of Scotland viewing him with some suspicion, and James sent Duncan south as a hostage in England. The documentary record calls him Campbell of Argyll, and gives his share of the liability for the king's ransom as 1500 merks, more than any other hostage save one. In time Duncan and the king were somewhat reconciled and following James's assassination Duncan was among the supporters of Queen Dowager Joan.

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