On 6 July 1621 he was created Viscount Rochford, a title previously held by his great-great-grandfather Thomas Boleyn, and on 8 March 1628 was created Earl of Dover.
She married Pelham Carey, son of Henry, 4th Lord Hunsdon (whom King James I had created Viscount Rochford on 6 July 1621; he was later created 1st Earl of Dover by King Charles I).
He was a descendant of Mary Boleyn and his father was Henry Carey, 1st Earl of Dover, who inherited the title Viscount Rochford and was later made first Earl of Dover by Charles I. His mother was Judith Pelham, daughter of Sir Thomas Pelham, 1st Baronet.
Also on 8 December 1529, the Earl of Wiltshire's only surviving son, George, was granted the courtesy title of Viscount Rochford.
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George Boleyn (c. 1504 – 17 May 1536); later Viscount Rochford (1529–1536) by courtesy
Horatio Nelson, 1st Viscount Nelson | Viscount | Vickers Viscount | Bernard Montgomery, 1st Viscount Montgomery of Alamein | William Howe, 5th Viscount Howe | viscount | Garnet Wolseley, 1st Viscount Wolseley | Charles Lyttelton, 10th Viscount Cobham | William Slim, 1st Viscount Slim | Edmund Allenby, 1st Viscount Allenby | William Lamb, 2nd Viscount Melbourne | Julian Byng, 1st Viscount Byng of Vimy | Alan Brooke, 1st Viscount Alanbrooke | William Waldorf Astor, 1st Viscount Astor | James Bryce, 1st Viscount Bryce | Henry St John, 1st Viscount Bolingbroke | Henry John Temple, 3rd Viscount Palmerston | Edward Grey, 1st Viscount Grey of Fallodon | Charles Bathurst, 1st Viscount Bledisloe | Walter Runciman, 1st Viscount Runciman of Doxford | Viscount Falkland | Samuel Hood, 1st Viscount Hood | John Anderson, 1st Viscount Waverley | James Craig, 1st Viscount Craigavon | William Beresford, 1st Viscount Beresford | William Barrington, 2nd Viscount Barrington | Stapleton Cotton, 1st Viscount Combermere | Seb Rochford | Rowland Hill, 1st Viscount Hill | Rochford |
During the reign of King Henry VIII, it belonged to Thomas Boleyn, then viscount Rochford, and it was the marital home of his daughter Mary Boleyn, sister of Queen Anne Boleyn, and Mary's second husband, Sir William Stafford.