|Marquessate of Cholmondeley|
|Creation date||22 November 1815|
|Monarch||The Prince Regent (acting on behalf of his father King George III)|
|Peerage||Peerage of the United Kingdom|
|First holder||George Cholmondeley, 4th Earl of Cholmondeley|
|Present holder||David Cholmondeley, 7th Marquess of Cholmondeley|
|Heir apparent||Alexander Cholmondeley, Earl of Rocksavage (b. 2009)|
|Remainder to||the first marquess's heirs male of the body lawfully begotten|
|Motto||Cassis tutissima virtus|
(Virtue is the safest helmet)
The Cholmondeley family descends from William le Belward (or de Belward), the feudal lord of the barony of Malpas in Cheshire who acquired the lordship of "Calmundelai" (as it was spelt in the Domesday Book) through his wife Beatrix, daughter of Hugh de Kevelioc, 5th Earl of Chester. Their eldest son David le Belward inherited the feudal barony of Malpas and was the ancestor of the Egerton family. The second son, Robert le Belward, became feudal lord of the barony of Cholmondeley, which he passed to his son Sir Hugh de Cholmondeley (or "Chelmundeleih"), who adopted the new surname.
His lineal descendant was Sir Hugh Cholmondeley (1513-1596), knighted by King Henry VIII. His eldest son was Robert Cholmondeley, 1st Earl of Leinster, while his youngest son Thomas was the ancestor of the Barons Delamere. Another son, his namesake Hugh, was the father of Robert Cholmondeley. He succeeded to the estates of his uncle Lord Leinster and was created Viscount Cholmondeley, of Kells in the County of Meath, in the Peerage of Ireland in 1661. He was succeeded by his eldest son, the second Viscount. He was a supporter of King William III and Queen Mary II and also served as Comptroller of the Household and as Treasurer of the Household. In 1689 he was created Baron Cholmondeley, of Nantwich in the County of Chester, in the Peerage of England, with remainder to his younger brother George Cholmondeley. In 1706 he was further honoured when he was made Viscount Malpas, in the County of Chester, and Earl of Cholmondeley, in the County of Chester, also in the Peerage of England and with the same special remainders.
Lord Cholmondeley never married and was succeeded according to the special remainders (and according to the normal descent in the viscountcy of Cholmondeley) by his younger brother George, the second Earl. He was a prominent military commander and commanded the Horse Guards at the Battle of the Boyne in 1690. In 1715, ten years before he succeeded his elder brother, he was raised to the Peerage of Ireland in his own right as Baron Newborough, of Newborough in the County of Wexford, and in 1716 he was made Baron Newburgh, in the Isle of Anglesey, in the Peerage of Great Britain. On his death the titles passed to his son, the third Earl. He was a politician and held office as Lord Privy Seal and Chancellor of the Duchy of Lancaster.
He was succeeded by his grandson, the fourth Earl. He was the son of George Cholmondeley, Viscount Malpas. Lord Cholmondeley was also a prominent politician and served as Captain of the Yeomen of the Guard and as Lord Steward of the Household. In 1815 he was created Earl of Rocksavage, in the County of Chester, and Marquess of Cholmondeley, in the Peerage of the United Kingdom. He was succeeded by his eldest son, the second Marquess. He represented Castle Rising in the House of Commons but in 1821 he was summoned to the House of Lords through a writ of acceleration in his father's junior title of Baron Newburgh. Lord Cholmondeley was childless and was succeeded by his younger brother, the third Marquess. He sat as Member of Parliament for Castle Rising and South Hampshire. As he outlived most of his children, including the elder son, the 3rd marquess was succeeded in his titles by his grandson.As of 2016 , the titles are held by his great-great-great-grandson, the seventh Marquess, who succeeded his father in 1990.
The courtesy title of the Marquess's heir is Earl of Rocksavage, while Lord Rocksavage's eldest son is known as Viscount Malpas.
A part of the office of Lord Great Chamberlain came into the Cholmondeley family through the marriage of the first Marquess of Cholmondeley to Lady Georgiana Charlotte Bertie, daughter of Peregrine Bertie, 3rd Duke of Ancaster and Kesteven. The second, fourth, fifth, sixth and seventh holders of the marquessate have all held this office. As Lord Great Chamberlain, the present Marquess is, along with the Duke of Norfolk (the Earl Marshal), one of only two hereditary peers to retain automatic seats in the House of Lords after the passage of the House of Lords Act 1999.
Peers in the House of Lords can hold their 70th birthday parties in the Cholmondeley Room at the Palace of Westminster. Among other uses, Baroness Elliot of Harwood organised a dinner in 1984 for all female Conservative members of Parliament and peers; and this event was held in this venue. The Cholmondeley Room and Terrace and the Attlee Room are available for private functions, sponsored by Members for personal use or for external organisations.
The heir apparent is Alexander Hugh George Cholmondeley, Earl of Rocksavage, the elder of the present holder's twin sons (born 2009). His younger twin brother is Lord Oliver Timothy George Cholmondeley.