Eustace Balfour of James Gascoyne-Cecil, 2nd Marquess of Salisbury. His paternal grandfather James Balfour was a nabob who had made the family's fortune as a contractor supplying the Royal Navy in India and became a Tory Member of Parliament (MP), while his mother's father was a Conservative cabinet minister in the 1850s. Her brother, Robert Gascoyne-Cecil, 3rd Lord Salisbury, was three times Prime Minister before being succeeded in 1902 by Eustace's elder brother Arthur Balfour. Eustace Balfour was educated at Harrow and at Trinity College, Cambridge, where he graduated in 1873. He then studied architecture under Basil Champneys, the designer of Newnham
Marquess of Salisbury Marquess of Salisbury in the Peerage of Great Britain. He was succeeded by his eldest son, the second Marquess. He was a Conservative politician and held office as Lord Privy Seal and Lord President of the Council. Lord Salisbury married as his first wife Frances Mary Gascoyne, daughter of Bamber Gascoyne, in 1821. The same year he assumed by Royal licence the additional surname of Gascoyne. He was succeeded by his third but eldest surviving son, the third Marquess. The third Marquess was three times Prime Minister of the United Kingdom, from 1885 to 1886, 1886 to 1892 and 1895