Earl of Airth Privileges heard evidence in support of the opposing claims in 1870 and 1871, but came to no decision, and the three Earldoms remained dormant. On 29 April 2011, Queen Elizabeth II conferred the title of Earl of Strathearn on Prince William of Wales. As a result, on marriage his wife Catherine became Countess of Strathearn. He generally uses this title in Scotland. Earl of Airth Earl of Airth was a title in the Peerage of Scotland, created on 21 January 1633 by Charles I, for William Graham, 7th Earl of Menteith. It became extinct on the death of his grandson
Earl of Iddesleigh Viscount St Cyres, of Newton Saint Cyres in the County of Devon, at the same time he was given the earldom. This title is also in the Peerage of the United Kingdom. He was succeeded by his eldest son, the second Earl. He notably served as Chairman of the Board of Inland Revenue. On his death the titles passed to his nephew, the third Earl. He was the youngest son of Reverend the Hon. John Stafford Northcote, third son of the first Earl. His eldest son, the fourth Earl, served as a Deputy Lieutenant of Devon. the titles are held