A link between the Egremont family at Petworth and George Sutherland-Leveson-Gower, 5th Duke of Sutherland (1888–1963) is the marriage of Sir William Leveson-Gower, 4th Baronet (c. 1647 – 22 December 1691) to Lady Jane Granville, the eldest daughter of John Granville, 1st Earl of Bath.
Their daughter Katherine (b. 1670) married Sir Edward Wyndham, 2nd Baronet, and they are the direct ancestors of the Egremonts of Petworth.
Their son John Leveson-Gower, later 1st Baron Gower (1675–1709) was the direct ancestor of George Sutherland-Leveson-Gower, 5th Duke of Sutherland (1888 – 1963).
She was born in 1535, had several already known portraits commissioned of herself, and her known portraits and her monumental brass bear a marked resemblance to this lady.
The couple had no children. He died childless, and all his estates and other wealth had been expected to pass to the children of his three sisters, Joan, Margaret and Florence Wadham. Florence Wadham (d. 1596) was the wife of Sir John Wyndham (d. 1572) of Orchard Wyndham, Watchet, in Somerset, and mother of Sir John Wyndham (1558–1645), ancestor of the Wyndham Earls of Egremont of Petworth House in Sussex.
Instead he determined to use much of his wealth to perpetuate his name. Wadham had been saving money to found a college at Oxford, yet his intentions had not been written down and his instructions on his death-bed were contradictory. Despite this, his wife Dorothy, adding much of her own paternal inheritance, attended to his wishes and, in her old age, oversaw the construction Wadham College, Oxford to its completion. The descendants of his sisters nevertheless still received large inheritances from Nicholas Wadham.
Dorothy Wadham has the distinction of being the first woman who was not a member of the Royal Family or titled aristocracy to found a college at Oxford or Cambridge.
That would explain the presence of her portrait miniature at Trinity College at Oxford.
The Egremonts of Petworth are also still in possession of an identified portrait of her.
The 'Frances Brandon' portrait first recorded in the Royal Collection in 1871 might even have been purchased at the Stowe sale of 1848. Richard Temple-Nugent-Brydges-Chandos-Grenville, 2nd Duke of Buckingham and Chandos, whose personal bankruptcy occasioned the sale, was also a direct descendant of Florence Wadham and Sir John Wyndham, and his grandmother had a love for old family portraits.
The fact that the Sutherland-Leveson-Gowers were in possession of a portrait of her, might be the result of a misunderstanding. The portrait had probably already lost its identification, and the Sutherland-Leveson-Gowers may have thought that she was one of their shared ancestors with the Egremonts from the marriage of Sir William Leveson-Gower, 4th Baronet (c. 1647 – 22 December 1691) to Lady Jane Granville, the eldest daughter of John Granville, 1st Earl of Bath, whose children married their other respective ancestors. The portrait is clearly inscribed 1560 so it predates the lifetimes of these their known ancestors. It would have been an easy assumption to make that she was the ancestress of either Sir William or Lady Jane. Or it might have been a gift of some other kind or a result from some other connection to the Wadhams yet to be determined.
The only connection these portraits appear to have to Lady Jane Grey is that part of the Petre inheritance received by Dorothy came from grants made by Queen Mary to her father Sir William Petre, of lands formerly held by Lady Jane Grey and forfeited to the crown, which had come in part from the great heiress Cecily Bonville, of Shute, Devon, Lady Jane Grey's great-grandmother.
It is perhaps interesting George Greville, 2nd Earl of Warwick (1746–1816), who had a portrait of Lady Jane Grey in his Blue Boudoir where he kept his works by Holbein, was married to Henrietta Vernon, the daughter of Lady Evelyn Leveson-Gower who was the sister of Granville Leveson-Gower, 1st Marquess of Stafford (1721–1803), the direct ancestor of the 5th Duke of Sutherland. George Greville, 2nd Earl of Warwick, was a noted potrait collector in his own right, however, and there is otherwise no reason to suppose that the painting of Lady Jane Grey that he owned was another portrait of Dorothy Wadham.
Interestingly, the Marquis of Bath, who were in possession of another portrait called Lady Jane Grey in the 1860s also shared direct ancestors with George Greville, 2nd Earl of Warwick and the Egremont-Wyndhams, going back to this period.
The Egremont-Wyndhams, George Greville, 2nd Earl of Warwick and John Alexander Thynne, 4th Marquis of Bath, George Sutherland-Leveson-Gower, 5th Duke of Sutherland and Richard Temple-Nugent-Brydges-Chandos-Grenville, 2nd Duke of Buckingham and Chandos were all direct linear descendants of John Granville, 1st Earl of Bath (1628–1701) and his wife Jane Wyche (d. 3 February 1692).
On the Berry-Hill Portrait page, I argue that this may have been the Berry-Hill Portrait, however, in lieu of facts, we must keep all theories open.
EDITED TO ADD:
In a somewhat surprising twist, the theory that NPG764 and the portrait of Lady Jane Grey owned by Robert Crozier is one and the same, was proved by Lee Porritt at the Lady Jane Grey Revisited in the article The Crozier Portrait – Is It Lost?
In the blog post Lee Porritt included a picture of the portrait owned by Robert Crozier as sketched by Sir George Scharf, director of The National Portrait Gallery between 1857 to 1895:
According to Lee Porritt, the «letters written to Amelia Coulton held in the registered packet for NPG764 list her address as 47 Sidney Street, Oxford Road, Manchester, the same address in which Robert Crozier is listed as living.»
Lee Porritt goes on to say that «Amelia Coulton actually lived at 22 Whitley Street, Manchester and it appears that she may have used Robert Crozier to sell the portrait on her behalf», a more innocent explanation than the one I have heavily implied that was the connection between them.