Baron Tweedsmuir, of Elsfield in the County of Oxford, is a title in the Peerage of the United Kingdom.
His eldest son, the second Baron, was the husband of the Conservative politician Lady Tweedsmuir.
The Honourable James Buchan, younger son of the third Baron, is an author.
The first Baron was brought up in the Tweed Valley in the Scottish Borders at Broughton close to the village of Tweedsmuir.
The heir apparent is the present holder's son the Hon.