When Lord Archibald Douglas -5th Earl of Angus was born on 16 October 1449, in North Berwick, Haddingtonshire, Scotland, his father, Sir George Douglas- 4th Earl of Angus, was 22 and his mother, Lady Isabel Sibbald- of Balgonie, was 31. He married Countess Elizabeth Boyd -Countess Of Angus on 4 March 1468. They were the parents of at least 3 sons and 3 daughters. He died on 19 November 1513, in Merchiston, Midlothian, Scotland, at the age of 64, and was buried in Whithorn, Dumfries and Galloway, Scotland, United Kingdom.
Scottish: habitational name from any of various places called from their situation on a river named with Gaelic dubh ‘dark, black’ + glas ‘stream’ (a derivative of glas ‘blue’). There are several localities in Scotland and Ireland so named, but the one from which the surname is derived in most if not all cases is Douglas in Lanarkshire 20 miles south of Glasgow, the original stronghold of the influential Douglas family and their retainers.
History: The family taking their name from Douglas in Lanarkshire were of Flemish origin. They rose to great prominence in the 14th and 15th centuries, controlling the earldoms of Douglas, Morton, and Angus, and later, Queensberry.
https://en.wikipedia.org/wiki/Archibald_Douglas,_5th_Earl_of_Angus Predecessor George Douglas, 4th Earl of Angus Successor Archibald Douglas, 6th Earl of Angus Born 1449 Died October 1513 (aged 63–64 …