Wyndham was the eldest son and heir of
Sir William Wyndham, 3rd Baronet, of Orchard Wyndham,
Secretary at War in 1712,
Chancellor of the Exchequer in 1713 and
Tory leader in the
House of Commons during the reign of King
George I (1714–1727) and during the early years of King
George II (1727–1760). His mother was Catherine Seymour, daughter of
Charles Seymour, 6th Duke of Somerset, and sister of
Algernon Seymour, 7th Duke of Somerset, created in 1749
Earl of Egremont and
Baron Cockermouth, with
special remainder to his nephew Charles Wyndham, the subject of this article. His younger brother was
Percy Wyndham-O'Brien, 1st Earl of Thomond, created
Earl of Thomond, having become the chosen heir of his mother's sister's childless husband,
Henry O'Brien, 8th Earl of Thomond (1688–1741). Wyndham was educated at
Westminster School and
Christ Church, Oxford, matriculating in 1725. In 1727, he undertook the
Grand Tour with his tutor, Mr Campbell, and spent the first two years studying at an academy in Paris. He then travelled in France and Italy with
Benjamin Bathurst. In 1730 he was in Rome, and in April that year he wrote to his father to inform him that he was taking "all precautions" to avoid contact with the
Old Pretender and his exiled Jacobite courtiers. ==Inheritance==