Gavin Campbell 1st Marquess of Breadalbane
 Gavin Campbell 1st Marquess of Breadalbane KG PC JP DL (9 April 1851 – 19 October 1922) styled Lord Glenorchy between 1862 and 1871 and known as The Earl of Breadalbane and Holland between 1871 and 1885 was a Scottish nobleman and Liberal politician.