Viscount Valentia

Valentia's eldest son and successor, Arthur, the second Viscount, was created Baron Annesley, of Newport Pagnel in the County of Buckingham, and Earl of Anglesey, in Wales, in the Peerage of England, in 1661.

He alleged that in 1728 he had been removed to an obscure school and that his death had subsequently been announced by his uncle, Richard, the sixth Earl of Anglesey.

The verdict was in James' favour, with his uncle being convicted of claiming he was dead and selling him into slavery so that he could take up the title and estates.

However, Arthur's legitimacy was disputed, and on 22 April 1771, the British House of Lords decided that his claim to the English titles of Baron Annesley and Earl of Anglesey were invalid and that they had become extinct upon his father's death.

However, his claims to the baronetcy of Newport-Pagnell, the baronies of Mountnorris and Altham and the viscountcy of Valentia were twice confirmed by the Irish House of Lords.

The 11th Viscount, was created Baron Annesley of Bletchington, in the County of Oxford, in the Peerage of the United Kingdom on 7 May 1917.

The Irish titles were inherited by his distant relative Reverend William Monckton Annesley, who became the 13th Viscount Valentia.

He was succeeded by his cousin Francis Dighton Annesley, who established his claim to the titles in 1959 and became the 14th Viscount Valentia.