Background
He was the oldest son of Sir Thomas Kennedy of Kirkhill and Dunure (Lord Provost of Edinburgh from 1685 to 1687) and Agnes Halden.
He was the oldest son of Sir Thomas Kennedy of Kirkhill and Dunure (Lord Provost of Edinburgh from 1685 to 1687) and Agnes Halden.
He was educated at the University of Edinburgh and at Utrecht University, and was admitted as an advocate in 1698.
He sat in the House of Commons of Great Britain from 1720 to 1721, and then became a judge of the Scottish Court of Exchequer. They had no children. Kennedy was joint Solicitor General for Scotland from 1709 to 1714, sharing the office with Sir James Stewart, 1st Baronet.
He was appointed as Lord Advocate in March 1714, but he was dismissed in October 1714 after George I succeeded to the throne.
He ended his parliamentary career a year later, when he was appointed as a judge of the Scottish Court of Exchequer.
5th Parliament of Great Britain]
He later supported the 2nd Duke of Argyll, who organised his return at a by-election in January 1720 as Member of Parliament (Member of Parliament) for Ayr Burghs.