Duncan "the Evil" de Forbes, Lord of Forbes

"According to Skene, in his treatise De Verborum Significatione, Duncan Forbois got from King Alexander (but which of the three kings of that name is not mentioned) a charter of the lands and heritage of Forbois in Aberdeenshire, whence the surname. In the reign of King William the Lion, John de Forbes possessed the lands of that name. His son, Fergus de Forbes, had a charter of the same from Alexander, Earl of Buchan, about 1236. Next of this race are Duncan de Forbes, his son, 1262, and Alexander de Forbes, grandson, governor of Urquhart castle in Moray, which he bravely defended for a long time, in 1304, against Edward I of England; but on its surrender all within the castle were put to the sword, except the wife of the governor, who escaped to Ireland, and was there delivered of a posthumous son. This son, Sir Alexander de Forbes, the only one of his family remaining, came to Scotland in the reign of Robert the Bruce, and his patrimonial inheritance of Forbes having been bestowed upon others. he obtained a grant of other lands instead. He was killed at the battle of Duplin, in 1332, fighting valiantly on the side of King David, the son of Bruce. From his son, Sir John de Forbes, 1373, all the numerous families in Scotland who bear the name and their offshoots, trace their descent."
[https://electricscotland.com/webclans/dtog/forbes2.html]
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"DUNCAN DE FORBES, Duncan "the Evil" de Forbes, Lord of Forbes son of Fergus de Forbes, succeeded about 1242.The first of the Family of Forbes of whom there is authentic record was Duncan de Forbes, who had a Charter by King Alexander III. of the lands of Forbes in 1272."
[https://www.hollandhistories.co.uk/forbes]

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Duncan de Forbes (born circa 1250) received the original charter to Forbes lands at Strathdon, Aberdeenshire from Alexander III in 1271/2. He died some time after the birth of his son, John de Forbes, in 1280.

http://homepages.rootsweb.ancestry.com/~legends/fobes.html

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https://en.wikipedia.org/wiki/Clan_Forbes